Help - Norton Internet Security 'Full Scan' Failure

I am using Norton Internet Security 2008 and whenever I do a full scan it says it is scanning common affected areas and start-up files, and then completes successfully after checking only 8117 files.  I have over 300,000 files on my computer.  Auto-Protect is also reporting that it detected 'Packed.Generic.200' and removed it, but it keeps popping up.

 

I rebooted into safe mode and ran a full system scan and the scan again completed after scanning less than 10,000 files.  I rechecked all of my NIS settings and they are okay.  Will someone from Norton Technical Support please help us resolve this problem before things get worse.  Until it is fixed our computers are at risk!

 

Ken