We can figure out the update if you know about when the problem began.
Hi Rich;
Here are the updates after which the problem started.
Security Update for Windows 7 for x64-based Systems (KB978601)
Security Update for Windows 7 for x64-based Systems (KB979309)
Security Update for Windows 7 for x64-based Systems (KB979482)
Security Update for Windows 7 for x64-based Systems (KB981332)
Windows Malicious Software Removal Tool x64 - June 2010 (KB890830)
Security Update for Windows 7 for x64-based Systems (KB978542)
Microsoft .NET Framework 3.5 SP1 Security Update for Windows 7 and Windows Server 2008 R2 for x64-based Systems (KB979916)
Update for Windows 7 for x64-based Systems (KB976422)
Update for Windows 7 for x64-based Systems (KB978637)
Security Update for Windows 7 for x64-based Systems (KB980232)
Update for Windows 7 for x64-based Systems (KB975496)
Security Update for Windows 7 for x64-based Systems (KB975560)
Security Update for Windows 7 for x64-based Systems (KB979683)
Update for Windows 7 for x64-based Systems (KB976662)
Update for Windows 7 for x64-based Systems (KB980408)
Security Update for Windows 7 for x64-based Systems (KB980218)
Security Update for Windows 7 for x64-based Systems (KB979559)
Update for Windows 7 for x64-based Systems (KB976264)
Security Update for Windows 7 for x64-based Systems (KB971468)
Update for Windows 7 for x64-based Systems (KB981793)
Cumulative Security Update for Internet Explorer 8 for Windows 7 for x64-based Systems (KB982381)
Let's see if we can figure out which update is causing the problem.