System restore saves file every time you install a new game, application, or software update. It takes a lot of disk space. If you think you want to save your disk space you can disable it in a simple way.
Follow this simple steps..
1. Right click on My Computer and click Properties.
2. A new window will appear. Then find and Click on the System Restore tab.
Then click ok after that click yes and you are Done. Have fun.