Back up Computer
System Restore is a method to Undo changes to Windows
without disturbing your documents or personal data. System
Restore makes a back up for the Windows Registry, and all of
your program settings. The process begins by creating a
Restore Point- a backup copy of the Registry settings. This
does NOT restore your documents, pictures or music.

Try This: Create a Restore Point
Log in as an Administrator.
Go to Start-> Control Panel.
Find System and Maintenance.
Click on Back up your computer.
Windows will request an Administrator's User Name and Password.
You may be prompted to review the automatic settings.