|Try System Restore to a date when all was good.|
Start >All Programs >Accessories >System Tools
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.
How is your Malware detection doing ???
Most Virus and Spyware scans are likely to work better in Windows Safe-Mode.