Instead of reformatting my computer, what can I do to speed up my PC?

Using a registry cleaner can clean up your computer and then make your computer faster,Why?the reason is that there may be some registry errors and remnant,corrupt files and temp files in your computer to cause "computer slow".

Every time you install and uninstall software on your computer and surfing online you create junk in the computer registry.over time, the registry can grow to enormous proportions, especially if the various programs you've installed do not do a good job of deleting and/or updating it's Registry entries.You need to scan and clean your computer with registry cleaner to make it fast.Good Registry Cleaner will improve your computer and Internet performance dramatically!

There are some comparison and review of TOP 5 registry cleaners.

http://www.speed-up-your-pc.com/

You can download and scan your computer for free.

To speed up your computer and free up space and memory for free:

Go to the Start Menu> Run

Type in "appwiz.cpl"

Uninstall whatever you don't need.

Next, go to Start> Run and type in "msconfig".

Go to the Startup Tab and uncheck everything you don't want to startup. If you want, you can uncheck everything, and your anti-virus will still restart itself when you log on.

Now go to My Computer> Hard Drive> Documents and Settings> [USER NAME]> Local Settings> and delete everything inside the Temp Folder. (This is a hidden folder so you will need to have "show hidden files and folders" checked in Folder Options) All the files in this folder are just temporary files that your Internet stored for certain websites.

Next, you should install CCleaner, it will get rid of alot of temporary files on your computer. It also has a registry repair system, which is easily the best free one available on the Internet:

http://www.ccleaner.com/download

Another option is to try defragmenting your computer.

Go to the Start Menu and go to All Programs

Go to Accessories and System Tools.

Choose Disk Defragmenter and when it loads click defragment.

Next, go to Device Manger (Start> RightClick My Computer> Properties> Hardware Tab> Device Manager) and expand all listings. Now rightclick and update all drivers.

Another thing I would say is to compress your files if you already haven't.

Open My Computer and right click on your hard drive

Check the Compress Drive button and let it do it's thing.

Finally, make sure your Hard Drive doesn't have any bad sectors. Go to My Computer> Right Click Hard Drive> Properties> Tools Tab> Check Now> Check both boxes and Start. It will ask you to reboot, so reboot. This will clear out any bad sectors on your Hard Drive.

These are short-term solutions however. the easiest way is to just upgrade the RAM on your system, but at least the ways above are free.

Good Luck =]

1st of all defragment your computer. You can do that through system tools. You will find it under accessories off the start menu. If that does not work, just go to an office supply store and purchase more memory. This is very simple to add

Clean up your hard drive by deleting all of the history and cookies. Also, you can install CCleaner and it will delete all files that are not necessary on your computer, including your text files and installation files that are not needed anymore.

Check http://www.pcoptimizerprodownload.com/

With pc optimizer pro you can safely clean, repair and optimize your computer.

It will help improve your system performance.

you should get programs that clean up your computer a good one that i will recommend is ccleaner you could get it here i hope this helped you out http://www.ccleaner.com/

cheapest upgrade will be memory