Often when your PC slowdown, it is because of Virus, to many internet temporary files and cookies, or you to many files in your hard disk. Of course for virus you should have antivirus, for temp files and cookies, you have your windows systems tool for cleaning or you can go to the temp files and delete thefiles there and remove some software installed that is not being used. Good luck

did you try using spyware remover or cc cleaner?

Defragging has always helped my computer a lot!
The best is to do a fresh install of your OS (i.e. XP) but you will lose all your settings.
My frustration is that when I use XP to delete all temp files, it doesn't delete all of them! I still find temp files when I do a virus scan.

Great info
 

That is great information. This is a very helpful post on cleaning up the hard disk. Thanks for sharing the tips as it has already boosted my computers performance and I have gained even some more free space.

hello to all. i think Tune Up is the best for a Pc hard disk and also the whole system. it is so easier and it make the pc faster an like a Engine

Clear your internet temporary cache, and defrag your hard drive. Those two things alone can make a HUGE difference!

Go to my My Computer, then select Windows, then select Temp Folder. Delete all the files inside the folders and files inside Temp Folder. To clean cookies and also remove shortcut that are not often used in your desktop.

if you feel that the performance of your computer slow downs means do all the task that you mentioned and if the problem still continuous means format your computer and reinstall the software.

I did it and it worked perfectly!! I didn't need a thrisd part defragger... Thanks for the tips!! my oc is back to life ;-)

First I run CCleaner's (registry) cleaner.
Then I de-fragment my C disk.
Then I run a disk clean-up.
Then I run CCleaner's (registry) cleaner again.