When I first joined MSFN, one of my first questions was why I was losing disk space...Then I disabled system restore, and it did the trick ! To disable it, do the following: Right-Click on 'My Computer' Go to the 'System Restore' Tab Check the 'Turn off System Restore on all drives' box Click 'Apply' Uncheck the same box Click 'OK' What you just did was disable system restore and enable it again...