|Try System Restore back to a date when all was good.|
It will also remove programs that were installed after the date you select.
Start >All Programs >Accessories >System Tools
When in SR, read what to do. If unsure, click "Cancel" button.
Using System Restore too many times can cause
more harm than good. After doing a restore
that does not fix a problem, then UNDO the
Restoration, and try another restore point, or
just do the UNDO.