Open the Start Menu/Programs Menu/Accessories Menu/System Tools Menu and then click on System Restore.
This will bring up the System Restore window. Select "Set a restore point" and click on the Next button.
Fill in a name for the restore point so you can find it and click on the Create button.

If you have problems, follow this link to a flash movie on how to Set a System Restore Point.

February 2013
January 2012