I have a P4 2.0ghz Windows XP Service Pack 2 small form factor PC with 1 gb ram installed. Everything was running good until I tried to install 'The SIMS' from an old disk. Needless to say the game did not install and 'hung' requiring me to reboot. After reboot everything went sooo sloooow. I thought maybe a program was corrupted so I uninstalled a few recent ones and still the problem existed. I tried disk check etc and nothing helped. I then opened the task manager and no programs seem to be running over 17,000kb (the highest of any program). BUT the CPU usage spikes up to 100% as soon as I try and do anything including just refreshing the page. Can anyone explain this and more to the point how do I fix it?. I cannot re-install as the original disks did not come with the PC as it was a gift. Please help.