There are two ways to turn off System Restore (probably more).
Way number 1:
1. Right Click on My Computer
2. Choose Properties from the menu
3. A window will come up
4. Choose the System Restore tab at the top
5. Check the box to turn off System Restore
6. Click Apply and OK
Way number 2:
1. Click on Start -> (All) Programs -> Accessories -> System Tools -> System Restore
2. Click on System Restore Settings link
3. Check the Turn off System Restore box
4. Click Apply and OK
