how do i restore my pc to new?

ive got a packard bell pc which ive had for a couple of years but it is now very slow, freezes up quite often and just generally annoying is there any way of restoring it to its original state, ive tried system restore but it says file missing and i have no recovery disk of any sort, if i was to delete everything off manually and reinstalled again would this work or just make matters worse any advice would be much appreciated thanks
will, October 2007
my computer is in pretty bad shape how can i get service to fix and repair my pc for free.

shawn brown, July 2010
use reg cure it works all the time for me..ive just bought a new three year subscription for less than 20 pounds GB.

john burman, April 2008
Don't do what you suggest. If you have Windows XP SP2, check that you have at least 512Mb RAM. Use the Windows System Tools to do a Disk Clean-up followed by a Disk Defragmenter. If you have not defrag'd for a while you may need to do it several times.

t, October 2007
link Click here to see other fixes for Packard Bell.