Computer Repairs Keilor Park

Name: Computer Repairs Keilor Park
Rating: 5

Slow technology driving you crazy? Wish your computer would run like new? Sick and tired of slow internet? Sound like you need top quality computer repairs in Keilor Park.

Here at Computer Cures, we understand the critical role technology plays in your everyday life. Whether you’re a home user that connects with family and friends via email and social media or a small business owner whose livelihood depends on high-performing tech, you need reliable IT support. We are here to help.

Our dedicated Keilor Park computer repair technicians can assist with everything from virus removal and data recovery to new computer setup and even home theatre installation. Whatever it is that you need, get in contact. We’d be more than happy to help.

Before you trust us with your tech, you might like to check out our many five-star reviews and testimonials. Our self-confessed tech obsession and years of experience motivates us to deliver the very best customer experience.

Our customer rating is: 5/5 based on 290 Reviews

1300 553 166

or fill in our online enquiry form today to set up an appointment with a local computer repair technician

Why Keilor Park Locals Trust Computer Cures

We are a Local, Family owned and operated Business.

We come to your Home or Business

Same Day Service (at no extra charge)

Flexible booking times to suit you

Punctual, Polite, Fast Service

10 Years Experience

Fully Trained & Qualified

30-Day Money Back Guarantee

In-house Technicians (No Sub Contractors)

1300 553 166

or fill in our online enquiry form today to set up an appointment with a local computer repair technician

Rated 4.8 Stars – With 90+ Google Reviews

Excellent

Based on 94 reviews

Elsabe Blom

2022-06-12

Thank you for your excellent service and prompt solution to my problem. Darryl did a great job!

Jackson Wood

2022-06-10

I had a great experience with computer cures! I was having problems with my laptop not charging properly and Paul and his team was able to quickly diagnose my problem and help be out with getting it fixed. Laptop is working like new after their help!

Pietro Same-but-differant

2022-06-09

I booked Computer Cures to do a service/tune-up as my laptop computer was running a little slow/crashing every now and then randomly freezing up for no reason at all. Luke the technician worked on my laptop and removed some of the apps that I didn't need to be there in the background running as they were slowing down my laptop computer as he explained, and fixed up the popups and the error messages that were coming on etc. The communication with Luke was great and extremely clear. Luke took the time to explain different things about the system. I couldn't be happier with his service and I will use them again for any computer troubles or also setting up my new a computer in the feature. The knowledge and professionalism, advice, dedication towards solving problems and I have no hesitation in recommending his services to family and friends. Thanks once again to Luke. Great work it is much appreciated .. C-/O } Computer Cures and the Team. Cheers Peter...

Tom C

2022-06-07

Luke came to our house, and assessed all the issues we were having with our Wi-Fi. He re-configured all the equipment, and fixed it completely. We have never had a such a reliable Wi-Fi network until he showed up and did his magic. I have this company on speed dial now, for anything computer or IT related. Thanks so much !

Jordan Marshall

2022-06-05

These guys blew my expectations with their incredible service. I was having some really strange WIFI issues which was driving me crazy as my internet provider was no help at all. Paul gave me the reassurance and understanding I needed and sent Luke the technician out the next day who quickly found the issue and had it fixed. Very happy with the high professionalism and quick turn around. Highly recommend.

Lee Palmer

2022-05-20

Paul was very patient and explained things very clearly as we worked through what turned out to be a self-inflicted problem with my emails. He was also helpful with assisting me with my printer problem though we have concluded that it really is a problem printer. Thank you for your time, Paul. I wouldn't hesitate to recommend Computer Cures.

Philip Sheezel

2022-04-29

Paul has provided unbelievable service to meet my computer needs- well above and beyond what we reasonably could expect. He even worked on weekends and at night to fix a broad range of computer problems. I can't thank him for enough to get me up and going very quickly- always with a smile and always with great expertise. Regards, Philip Sheezel

Sandra Timbrell

2022-03-23

Paul and Luke were persistent in solving issues with my new mini desktop. It was not straight forward, thanks guys!

1300 553 166

or fill in our online enquiry form today to set up an appointment with a local computer repair technician

Need Computer Repairs in Keilor Park?

Computer Repairs Keilor Park

Need computer repairs Keilor Park? Most of us use our computers on a daily basis, and when they aren’t working as they should, it can be incredibly frustrating. Get your computer fixed fast and thoroughly by our friendly team of local Keilor Park technicians. We work with both PCs and Apple Macs, and both laptop and desktop computers. Whatever computer problem you need fixing, we have the knowledge and equipment to help.

Virus & Malware Removal Keilor Park

Malware, such as viruses, worms, and ransomware, can compromise your data and private information. Unfortunately, most security software cannot provide 100 percent protection against malicious software. If you believe your computer is infected, get in contact with our Keilor Park technicians as soon as possible. The quicker you get rid of it, the less damage it can do.

Need Wifi or Internet Help in Keilor Park?

Wireless (Wi-Fi) Network Setup Keilor Park

Fast, reliable internet is crucial – there are no two ways about it. If your home or office in Keilor Park is suffering from slow Wi-Fi that drops out or has an incredible weak signal, get in touch today. Here at Computer Cures, we have an exceptional success rate at boosting Wi-Fi speed and strength, so you can get back online ASAP.

TVs & Home Theatre Setup Keilor Park

Do you need help setting up your brand-new Smart TV in Keilor Park? We can connect your TV to your Wi-Fi network, and install the latest streaming apps (such as Netflix, ABC iView, SBS on demand, TenPlay, and more). We can also create a home theatre setup for the ultimate TV and movie watching experience. Plus, we have years of experience installing Apple TVs, Foxtel, and wireless Sonos speakers.

1300 553 166

or fill in our online enquiry form today to set up an appointment with a local computer repair technician

What Can We Help You With?

Computer Repairs

Wireless (Wi-Fi) Network Setup

Virus & Spyware Removal

We have Local Technicians in the Keilor Park Area

1300 553 166

or fill in our online enquiry form today to set up an appointment with a local computer repair technician

What Our Happy Customers Have To Say

290 + Reviews

Book Online Now

Fill in your details below to receive a call back within 5 minutes.

We Support These Local Businesses

frame australia

dalu ventures

1300 553 166

or fill in our online enquiry form today to set up an appointment with a local computer repair technician

Frequently Asked Questions

What is a 'Blue Screen' error message mean?

A blue screen error message is a serious message, which means there is a critical hardware fault or serious software issue. Contact us, so we can fix this for you asap.

What is a ‘No Boot Device’ error message?

No Boot Device Found, may mean there is some fault with your internal hard drive. Make sure you have backups of your important information and give us a call, so we can repair this for you.

My computer is very slow to boot up, can you help?

Your computer slowing down over time may be an indicator that your hard drive is starting to fail, or there is low free space, or there is a virus, or software or windows corruption. Give us a call, so we can fix this for you before it gets worse.

Do you repair Microsoft Surface Pro Tablets or Laptops?

No. Unfortunately, Surface Pro Tablets & laptops cannot be repaired. They need to be sent back to Microsoft, and they will send you a refurbished unit.

I spilled water on my laptop, can you repair this?

Currently we are not able to repair water or liquid damaged laptops or macbooks, as the success rate is less than 20%

Do you sell replacement laptop batteries?

No, we currently do not sell or stock replacement laptop batteries.

We Fix & Repair All Major Computer Brands

Samsung Computer Repairs

Keilor Park, VIC 3042

We also service these surrounding suburbs

Need Computer Help? Call our IT experts on

1300 553 166

Google Rating

4.8

Based on 109 reviews

Computer Cures | Wifi & Internet Technicians

4.8

Viv Rowe

00:31 19 Nov 23

From my first phone call I felt relaxed and confident with getting them to help me when I got a "blue screen" notice on my computer.Jas came to my home, checked it over, and had to take it away to have a new hard drive installed. The next day was phoned with the great news all went smoothly and it could be returned to me! He delivered it back to my home, and I could not be happier with how it is like a new computer and a pleasure to use.Thank you guys!

Warwick Cavanagh

05:47 08 Nov 23

It was great to find Computer Cures! As a recently retired CEO I found myself struggling with some of those systems which hitherto I was privileged to have ‘someone from IT’ sort out for me. A hard drive died, my calendar would not sync with my email…suddenly my life was out of control lol!! Paul listened to my angst (poor Paul..) and diagnosed the problem immediately.He then arranged for Luke to attend the following day to sort the issues. From beginning to end such lovely people to work with, reliable, efficient and friendly. I know where to go with any issues in the future which, frankly, is a great relief.Warwickread more

Aj Nair

01:01 05 Oct 23

Paul is absolutely brilliant with his customer service and knowledge on the subject matter. Service was done super quick and at a very fair price as well. Will 100% recommend working with Computer Cures.

Rebecca Porteous

00:08 08 Sep 23

Over the last couple of days I had received many unsolicited authentication codes to my phone. I had tried to get help from a number of computer places with no success. I called Computer Cures this morning and spoke to Paul who quickly identified my issue and put my mind at ease. I can not recommend Paul and the service more highly.

Sharmaine Webley

05:43 07 Sep 23

I contacted Computer cures regarding my broken laptop. One of their engineers got back to me quickly and was very transparent regarding them being unlikely to successfully repair my device. Not only did they give me a recommendation for a company that would be able to, they called up beforehand and explained my enquiry to the referring repair company which I greatly appreciated.

Nick Cerche

06:48 01 Sep 23

Very responsive and with prompt turnaround time. Gave great advice on how to best, and most cost effectively, fix my hardware issue.

John Richards

06:59 05 Jul 23

I had purchased a new computer and attempted to transfer files plus emails from my old one. Computer Cures were recommended as a good option to clean up a mess and they certainly did. Not only did they make sure all files and emails were transferred correctly, they sorted my security and other areas that were not working correctly, even on my old computer. First class service, they know what they are doing and how to handle a dinosaur like me. Great value, true professionals.

Kathryn Willis

05:51 02 Jul 23

If you need your computer fixed FAST these are the guys to turn to!!! After a long and frustrating 'illness' my ancient (10+ years) desktop computer finally died. Paul and Madu quickly came to the rescue, retrieving all my photos, files etc off the old hard drive and installing a new replacement drive.The interior was cleaned thoroughly and a failing part inside fixed. My computer was ready to be returned 48 hours later. They were very flexible with times for computer pickup and return (they came to my house.) Paul was great - we discussed my computer's symptoms and he explained clearly what could be done, and he took my call after business hours as I'd been unable to phone during the day. My computer is super fast and running perfectly now!!! Highly recommend Paul and his team!read more

Jade C

07:22 03 Mar 23

I would happily recommend this company, they are quick to respond and thorough. They are happy to take the time to answer questions and work efficiently. I will be calling on Paul and the team again.

Shani Prendergast

10:05 16 Feb 23

From the very beginning I felt like we were in good hands with Computer Cures. Paul was excellent over the phone and really took the time to understand our wifi issues and the layout of our house. Luke, the technician, was also superb. Called ahead because he could come earlier than planned, and worked diligently through our issues and my many questions! Managed to work with the equipment we had, and gave use much stronger wifi signals than we thought possible. We also have options up our sleeve if our existing equipment doesn’t hold up. Cannot tell you how relieved we feel to have reliable tech people solving issues in person in our home, rather than spending hours and hours on the phone (with no success)! Thank you Paul & Luke!read more

Nora Mutalima

05:13 06 Feb 23

I wish I could give more than 5 stars!! The service was impeccable! Luke was just amazing. He quickly made the diagnosis and fixed our WiFi issues. There was no upselling, he used what we already had and got it working like it never has before. I now know where to go for my IT needs! I am a very happy bunny!!!

Flam Boyant

22:57 11 Jan 23

Paul was a life saverHe was upfront and honest about the services that computer cures offered and didn't oversell the services they offered.100 percent coming back with any issues, big or small

Kerri Spillane

07:50 22 Dec 22

Computer Cures have been my go to for all things computer for a number of years now and never fail to save me! After nearly 20 years (with a couple of re-builds along the way) my computer decided to die last week, great timing with Christmas around the corner, but Paul and Darryl were able to help me. Their service is so fantastic and nothing is too much trouble. Within a week, they got me a brand new desktop and managed to save everything from my old computer and set up and install the new one. If you ever need computer help I can totally recommend Computer Cures and Paul and Darryl. Thank you both so much, really appreciate all your help.read more

Elsbeth Torelli

05:30 08 Nov 22

Computercures is my one stop shop for managing my devices whether it is my iPhone, iPad or computer and helping me with the technical issues that inevitably occur from time to time. I have never been disappointed with the service and they are passionate solution (cure) seekers. Special thanks to Paul.

Rod Chapman

04:25 03 Nov 22

I rang Computer Cures after years of frustrating WiFi and modem issues and spoke with Paul. Even after telling me that I lived outside of the territory that Computer Cures services, he spent nearly half an hour on the phone with me, carefully detailing what the likely issues are before recommending a suitable course of action for me to follow up elsewhere. If this is the level of customer service Computer Cures offers to people who won't actually go on to be a customer, then actual customers can be sure they're in excellent hands. Thanks so much for your help and advice, Paul, and I thorough recommend Computer Cures to anyone considering them for assistance.read more

Aviaja Young

04:02 02 Sep 22

Paul was such an amazing help, I fell for a scam text and Paul was extremely understanding and helpful in removing the virus’s in my device. He was patient and explained everything thoroughly so we could fix the issue. Thank you so much, will be recommending him in the future !!!

Nat Portelli

05:39 16 Aug 22

Thank You Paul, Computer Cures have again saved the day with your easy to understand guidance, professional and timely support. We look forward to utilising CC's advice and continued support. Best Nat Portelli Director, NPRPS Pty Ltd

Jeremy Hunt

03:37 04 Aug 22

We had endless issues at home with our mesh network which was causing massive headaches as my wife and I work from home. These guys were awesome, came and assessed the situation and promptly fixed it. Highly recommend!!

Jackson Wood

02:10 10 Jun 22

Pietro Same-but-differant

10:51 09 Jun 22

I booked Computer Cures to do a service/tune-up as my laptop computer was running a little slow/crashing every now and then randomly freezing up for no reason at all.Luke the technician worked on my laptop and removed some of the apps that I didn't need to be there in the background running as they were slowing down my laptop computer as he explained, and fixed up the popups and the error messages that were coming on etc.The communication with Luke was great and extremely clear. Luke took the time to explain different things about the system. I couldn't be happier with his service and I will use them again for any computer troubles or also setting up my new a computer in the feature.The knowledge and professionalism, advice, dedication towards solving problems and I have no hesitation in recommending his services to family and friends. Thanks once again to Luke. Great work it is much appreciated .. C-/O } Computer Cures and the Team.Cheers Peter...read more

Tom C

00:43 07 Jun 22

Jordan Marshall

01:50 05 Jun 22

Lee Palmer

01:57 20 May 22

Paul was very patient and explained things very clearly as we worked through what turned out to be a self-inflicted problem with my emails. He was also helpful with assisting me with my printer problem though we have concluded that it really is a problem printer.Thank you for your time, Paul. I wouldn't hesitate to recommend Computer Cures.

Philip Sheezel

04:44 29 Apr 22

Pietro Same-but-differant

07:29 24 Mar 22

I booked Computer Cures to do a service/tune-up as my laptop computer was running a little slow/crashing every now and then randomly freezing up for no reason at all.Luke the technician worked on my laptop and removed some of the apps that I didn't need to be there in the background running as they were slowing down my laptop computer as he explained, and fixed up the popups and the error messages that were coming on etc.The communication with Luke was great and extremely clear. Luke took the time to explain different things about the system. I couldn't be happier with his service and I will use them again for any computer troubles or also setting up my new a computer in the feature.The knowledge and professionalism, advice, dedication towards solving problems and I have no hesitation in recommending his services to family and friends. Thanks once again to Luke. Great work it is much appreciated .. C-/O } Computer Cures and the Team.Cheers Peter...read more

Sandra Timbrell

09:39 23 Mar 22

Paul and Luke were persistent in solving issues with my new mini desktop.It was not straight forward, thanks guys!

Jess Zuccala

08:27 20 Mar 22

Wow, is saying it mildly.You think you are future proofing a new house with wiring only to find the wifi is sub-standard. I've bought everything under the sun from extra routers to wifi extenders only to be disappointed.Until NOW.The guys from Computer Cures have wired wifi hot spots around the house that enable wifi speeds the SAME as a PC. I am blown away!!!They even serviced my NAS, found hidden data that has been filling my PC hard drive and fixed up my other ethernet wiring issues.These guys do it all and they are so courteous to boot.They certainly cure my computer needs!!! 10/10

Robert Hoskin

02:27 28 Jan 22

Luke did a great job setting up my new computer and transferring programs/files from the old machine. In a couple of hours I was enjoying the increased efficiency of an updated machine. There were a couple of hiccups with incompatible older programs, but these were sorted out on the spot. And then some issues I discovered later were solved and quickly put right in a remote hook-up with Paul. Their knowledge and professionalism makes Computer Cures my 'go-to' for computer and wi-fi problems - unbiased professional advice, prompt friendly service, and reasonable prices are an unbeatable combination. Thanks Paul and Luke.

Micky Sival

00:04 14 Jan 22

I contacted Paul with a hardware issue and found him to be extremely helpful and friendly, he was able to identify my issues extremely fast and provide an incredibly insightful solution at an extremely competitive price. I would highly recommend Paul and the entire team at computer cures, first class service.

Bill Cleland

04:17 23 Dec 21

Luke and Paul help me with my email issues. I have been using Computer Cures for a number of years, they have always been very helpful.

AC Drummond

00:05 16 Nov 21

I dealt with Paul and Fred and couldn't have had a better experience. Paul was easy to talk to and was quick to respond and organise an onsite after a few questions about what issues we were experiencing. Fred was very Professional explaining the WiFi issue in detail and recommending a resolution in a clear and concise way. I knew what I was getting and why which made my decision very easy. Highly Recommend their services.

Marina Gabriela Bonofiglio

07:34 21 Jul 21

Talked to Paul about setting up my Synology NAS. Communication was great and extremely clear. Paul took the time to explain different recommendations and steps to take according to my business needs. Love that they offer in-person and online support. Will be working with them again in the future.

Marilyn Anderson

08:43 14 Jul 21

Last week Fred came to my house to transfer my phone data to my new iphone 12. He did it quickly and efficiently. My computer issues were more troublesome, but after following process after process he fixed it all. My Apple pro is 10 years old and he recommended I upgrade my model to run all the updates etc that I need . Thanks to a fantastic local business. The name says it all Computer Cures.

Steve Chrysanthou

04:49 13 Jul 21

Very friendly, helpful and most importantly very honest. I'll be definitely using these guys again.

Pete Machin

01:26 28 Jun 21

Recently I was searching for assistance regarding advice on updating audio visual equipment for my new smart TV. I'm located in Sydney and couldn't find a suitable-sounding company until I came across Computer Cures and of course I subsequently found out Computer Cures are located in Melbourne! This has happened to me in the past with other specialist businesses. In this instance all I could find were businesses wanting to repair, install antennas, install home theatres etc.I lucked out when I connected with Katee from Computer Cures who went out of her way to assist. In fact her assistance was quite extraordinary both on the phone, calling back and then following through with information she sent via email. I was quite overwhelmed!!If this is indicative of the service and assistance provided by Computer Cures then existing and/or prospective customers are lucky they have such a caring and professional company based in Melbourne.read more

Glen Poulter

04:25 17 Jun 21

Paul has given me great advice over the phone, knows his stuff and doesn't try to sell any nonsense. Would highly recommend him to anyone who has a computer issue. Will be coming back here whenever I have problems.

Fran-chyse Stroud

05:38 25 May 21

I recently had my son’s computer breakdown with hard drive issues. Not great for a gaming high schooler. I dropped it into Paul and his team at Computer Cures, where they quickly diagnosed the problem, then went on to fix it in a very quick time frame. A couple of weeks later, the computer is like new again and my lad is back online gaming with his friends. Great Job!!

Ellen New

00:42 22 May 21

Thank you to Paul at Computer Cures and Adam the technician. I had a problem with my desktop and lap top and Adam was able to rectify the problems. Nothing was a problem to him. Adam was so professional and friendly and showed great Customer Service. From my initial phone call to Paul at Computer Cures to Adam rectifying the problems their service is excellent. Well done team at Computer Cures.

Sarah Johnston

02:10 11 May 21

From the very first interaction with Paul on the phone to the final team-work by Harry & Fred, my experience was great. Where others failed to provide a solution to our pathetic wireless network, Computer Cures succeeded.Computer Cures knew exactly how our network should be structured and implemented a long-term hardwired & wireless future-proof solution.Our business has never run smoother and we are no-longer confined to the front reception area (The wifi hang-out place).The efficiency and productivity of our business has shot thru the roof.Thanks Computer Cures.

Amor Meaghan

01:36 07 May 21

Computer Cures solved all of our wifi issues beautifully. Freddie couldn't have been more helpful or knowledgeable. We couldn't be happier with their service and will use them again for any computer troubles we have.

DONNA TEAGUE

00:41 03 May 21

These guys were outstanding. We had complex issues and they were onto it straight away and sorted everything out really quickly. They sent very professional people to sort out our problems - highly recommend Fred he was fantastic to deal with.

Paul Bryner

07:29 28 Apr 21

Computer Cures have been great to deal with on every level. Their customer service is always very professional. They have helped up us with both Mac and PC repairs, and we have sent them a few referrals too. Keep it up.

Harry Nicholas

08:14 15 Apr 21

I am Harry Nicholas. I work here at Computer Cures and i love it.We are a small team but dedicated to providing ethical technical support and solutions.I have worked for other companies in the past and none come close to the standard Paul (The Owner) provides.The service we provide is unrivalled.

Lisa Mitchell

08:09 14 Apr 21

I could not have sorted out all of my new connections without Harry’s help. Very polite and efficient. Thanks.

Computer Repairs Keilor Park

Slow technology driving you crazy? Wish your computer would run like new? Sick and tired of slow internet? Sound like you need top quality computer repairs in Keilor Park.

Our customer rating is: 5/5 based on 290 Reviews

Why Keilor Park Locals Trust Computer Cures

We are a Local, Family owned and operated Business.

Rated 4.8 Stars – With 90+ Google Reviews

Need Computer Repairs in Keilor Park?

Computer Repairs Keilor Park

Virus & Malware Removal Keilor Park

Need Wifi or Internet Help in Keilor Park?

Wireless (Wi-Fi) Network Setup Keilor Park

TVs & Home Theatre Setup Keilor Park

What Can We Help You With?

We have Local Technicians in the Keilor Park Area

What Our Happy Customers Have To Say

290 + Reviews

Book Online Now

Fill in your details below to receive a call back within 5 minutes.

We Support These Local Businesses

Frequently Asked Questions

What is a 'Blue Screen' error message mean?

What is a ‘No Boot Device’ error message?

My computer is very slow to boot up, can you help?

Do you repair Microsoft Surface Pro Tablets or Laptops?

I spilled water on my laptop, can you repair this?

Do you sell replacement laptop batteries?

We Fix & Repair All Major Computer Brands

Keilor Park, VIC 3042

We also service these surrounding suburbs

Need Computer Help? Call our IT experts on

1300 553 166

Subscribe to Our Newsletter

Subscribe to our Popular Monthly Newsletter for the latest product reviews and technology tips to speed up your computer.

Contact Us

Computer Cures

Book Online Now

CTA - Online Enquiry

Computer Repairs Keilor Park

Slow technology driving you crazy? Wish your computer would run like new? Sick and tired of slow internet? Sound like you need top quality computer repairs in Keilor Park.

Our customer rating is: 5/5 based on 290 Reviews

Why Keilor Park Locals Trust Computer Cures

We are a Local, Family owned and operated Business.

Rated 4.8 Stars – With 90+ Google Reviews

Need Computer Repairs in Keilor Park?

Computer Repairs Keilor Park

Virus & Malware Removal Keilor Park

Need Wifi or Internet Help in Keilor Park?

Wireless (Wi-Fi) Network Setup Keilor Park

TVs & Home Theatre Setup Keilor Park

What Can We Help You With?

We have Local Technicians in the Keilor Park Area

What Our Happy Customers Have To Say

290 + Reviews

Home computer resurrected.

Brilliant on-site support

Resolved problem with external monitor

Excellent service friendly and helpful

First class support

Absolutely fantastic service.

Complicated Issues Resolved

Computer repair

Above and beyond the call of duty.

Excellent Service

Harry was knowledgeable and so patient in explaining issue to my son Zach

Excellent and "Very Special" Professional Service

Book Online Now

Fill in your details below to receive a call back within 5 minutes.

We Support These Local Businesses

Frequently Asked Questions

We Fix & Repair All Major Computer Brands

Keilor Park, VIC 3042

We also service these surrounding suburbs

Need Computer Help? Call our IT experts on

Subscribe to Our Newsletter

Subscribe to our Popular Monthly Newsletter for the latest product reviews and technology tips to speed up your computer.