Spybot S&D - can't check for problems

When I attempt to "check for problems" using Spybot S&D, the action line shows running bot check 101/109940 and a blue window pops up stating " windows - no disk".  This happens almost immediately after starting the scan.  At that point the only way I can proceed is to end the Spybot program and the "windows - no disk (program?) using windows task manager. Tea Timer does run ok.  Program is utd. 

Any ideas?  This started happening under version 1.4 once I updated to NIS 2007.  I've recently updated to 1.52, but the problem still exists.