NIS2009 Full System Scan/Doesn't complete all files

I can't believe this hasn't beat to death on this forum already, but since I can't figure out the search verbage to pull prior articles with this problem, I'm posting it here.

 

I am running XP SP3,  NIS 2009 Version 16.7.2.11.  Virus defs are current and Norton Update is completing normall.

I have around 1 million files on the system.

 

Under normal operation, a Full System Scan completes with a "Files Scanned" count at the full system file count.

Presently, for a Full System Scan with all hard drives specified, the Full System Scan is stopping somewhere in the 200,000-300,000 file count and indicating normal completion.

 

Something is up.  Rootkit?

 

How do I troubleshoot this.  I need to see a TOTAL Full System Scan completed.

 

Thanks!