This is valid for Windows XP Home and Pro.
If you are experiencing "random" slowdowns and "high" CPU usage for no reason, this may be the cause of the problem. Where do you find it?
Turning off "System Restore"
|Start --> Control Panel -->||Performance and Maintenance -->||System -->||System Restore Tab.
Check "Turn off System Restore."
After that, Disable and Stop the System Restore Service:
Disabling of "System Restore Service"
|Start --> Control Panel -->||Performance and Maintenance -->||Administrator Tools -->|
|Services -->||Select "System Restore Service" -->|
|Disable and Stop the Service|
You can also check out my Windows XP Super Tweaks Page.
"Have you tweaked your OS lately?"
Choose the look:
Windows Service Configurations!
Includes explanations of each service and advice on which services you can safely disable.