Your PC is slow. Really slow. You've used CCleaner to get rid of the garbage, you've lightened the load by uninstalling bloatware with Revo, you've checked inside, outside, upside down and backwards for a virus, and you still have time to make a coffee by the time it takes your computer to start up. Is it time to reformat your hard drives?
Luckily for you, reformatting your computer is really simple. Go to My Computer, find the offending hard drive (in all likelihood, C:) and right click. You'll see Format... under the context menu options, and find all the information you need when you click.
What takes a little more effort, however, is preparing for the reformat. As it will erase absolutely everything on the disk, if you don't make the right preparations, you could find yourself with a faster computer, but absolutely nothing to do on it. Follow the steps laid out in our list first to make reformatting your hard drive as easy and safe as possible!
Save your movies, music and documents. Make sure you don't miss anything important by using a dedicated backup program like Oops!Backup or CrashPlan - this is also the safest option. Alternatively, you can use a synchronization program like Dropbox - although backup isn't the app's main purpose, it happens as a sort of a secondary effect.
Create a copy of your drivers. Ok, this one is seriously boring, but it's only when all your hardware (like your mouse and keyboard) suddenly stop working post-reformat that you'll regret not making a copy of those all-important settings. Don't worry, this isn't a manual job - download a program like SlimDrivers or Driver Genius and they'll do the task for you.
Get a list of the software installed on your PC. This ensures that when you are reinstalling your software, you don't forget any of the essential, but less obvious apps. Just make sure to only install the important stuff - after all, you are reformatting to lighten the load! Try Aida32 or PC Wizard for help with this task.
Make a copy of your browser settings. Unless you use a bookmark sync service, there is a risk of losing hard-earned browser settings, bookmarks and passwords when you reformat. Without a doubt, FavBackup is the best tool for this job, closely followed by Transmute. The great thing about these apps is that they support a variety of browsers, so you shouldn't have to search around for yours.
Back up your mail client. If you still use a computer-based mail client like Thunderbird or Microsoft Outlook (although we really think you shouldn't!), it's essential to back the emails up - the reformat will obliterate them. MailStore Home will do the job perfectly.
Save your downloads in progress. If you use a P2P app like uTorrent, the reformat will erase any downloads you have in progress, and they could be really tricky to search for again and re-download. To avoid this risk, save the temporary file by copying the program's temporary file (for example, C:\Programs\uTorrent\Temp) and replacing it in the same place once you have reinstalled the program.
Double check you still have your original installation disks. If something goes wrong, you might just have to reinstall the operating system, and if you don't have the original disks, you could be in deep, deep trouble!
Ensure you have all the serial keys you'll need. If any of your software has a paid license, you'll need the license keys to get it up and running in full version. If you have the programs, but not the serial key documentation, don't worry. A program like Product Key Explorer will help you do just this.
If you've followed our advice, you'll be ready to reformat your computer and kiss goodbye to lag and drag. Let us know how you get on below!
[Via OnSoftware Italy]

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Excellent article and great detail -- my commendations!
There is something one can try to speed up the PC enough to possibly avoid the dreaded re-format and re-install of everything though (it's not exactly a barrel of fun to go through and re-install all your programs and stuff).
I find many users experience speed problems because they don't do enough maintenance, particularly defragmenting (and who can blame them? It can take a long time to defrag).
Disks become fragmented with use. Fragmentation is the accumulation of incontiguous pieces of files and free space randomly scattered across a disk. Writing files to such a disk takes a long time (not to mention later accessing, editing and then saving them).
All this slows down the PC and wears out the disks much faster.
A basic defrag program will put all the pieces together, while a good one will also consolidate the free space and the best ones will do so while you use the PC and the best of the best will prevent fragmentation.
Here's a Top 10 Reviews side-by-side comparison of the best defrag programs available:
http://disk-defragmenter-software-review.toptenreviews.com/
The top placers are automatic and they all offer a free trial.
The gold medalist prevents fragmentation. You can get a free trial via the review or at http://www.diskeeper.com
EXCELLENT
Try Systweak Advanced System optimizer to clean & optimize your PC.
http://www.systweak.com/aso/
Hope it will help before formatting your PC.
This might (probably) will be hard for me >< /xD Lol
The only time I needed to reformat my HD was after MS declared my Win XP Pro to be pirated. This was just 3 days after MS verified my Windows, so I could download the SP2. Unfortunately I had no way to prove it was mine and had to go buy a copy. I'm know I'm not the only one caught with a false piracy claim, there is/was a class action suit against MS. I regularly (every week) run a disk clean, registry clean and defrag and add to that a deep malware scan with 3 different malware tools every month. A clean computer is a happy computer, quick too
its so easy and now im really interested about the computer knowings.
Thanks~
This article is very helpful for us~
LMAFO
@Bill R -- I have no idea where you are getting your information, but defragmenting is almost completely worthless on NTFS volumes. Additionally, Windows 7 (all versions) automatically defragments all volumes once a week in the background via Task Manager. Then again, you are probably just some troll hired to post this idiotic advice, since any IT person knows it already. That, or you work for the "Geek Squad".
@pugboy and the other posters...pugboy is absolutely correct, and if you are using Microsoft Security Essentials (Free) and Windows Defender (Free) that run as a part of your OS and not a program "using" your OS you'll notice a speed difference. Most AV programs are nothing more than bloatware using precious resources. @BillR adding an advice post to an advice post? What a dweeb LOL!
Excellent! very helpful for speed up the PC
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