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.
3. check mark Turn off system restore on all drive
Then click ok after that click yes and you are Done. Have fun.