You will need administrative privilage to do it. First Click on Start > All Programs > Accessories > System Tools > System Restore
You should see a window similar to one in the image
if you click next, you will see this. Here all of the previous restore points are the dates in Bold Blue color. Click on a Bold Blue date to restore your computer to that date, and click on Next to proceed. The computer will restart during the process and you will have to be patient till the process completes.
These settings are reversible. You can undo, redo, restore to any date, for any number of times After the system restore is complete, it will ask your conformation if you want to keep the changes or undo them.
Disable System Restore: Click on start > all programs > Accessories > System Tools > System Restore Click on System Restore settings. Check the box:Turn off system restore on all drives. press apply. press ok.
How to enable system restore
Click on start > all programs > Accessories > System Tools > System Restore Click on System Restore settings.If you had turned off system restore then you will get a prompt asking if you want to turn it on. (if you are alreasy inside the restore settings) UnCheck the box:Turn off system restore on all drives. This will start system restore monitoring all your drives/partitions press apply. press ok.