Another way .
http://www.tweaktown.com/document.ph...Id=145&dPage=2
#2 - Removing Restore Points For Disk Space
Windows XP has a feature to create 'Restore Points', which are simply files that contain information about the setup of a system, so that if it crashes, all settings, et cetera, are not lost. However, sometimes Windows creates multiple unecessary restore points - gigabytes worth in some cases. To delete all but the most recent restore point, simply go to Start -> Programs -> Accessories -> System Tools -> Disk Cleanup.
Select the drive you wish to clean up, then 'Clean Up...', and finally, click Yes. Done!