I fired up my copy of Microsoft Baseline Security Analyzer and was promptly warned that a newer version (2.01) was available. I downloaded it (here) and removed the old version. However, the installation of the new version failed to complete as there was a problem registering serversecure.dll and xmldb.dll with error code "HRESULT - 2147221164". Nice... even a second attempt failed, so now I had the newest copy of the security analyzer, but couldn't get it installed.
Thanks to some searching I found that running the "regsvr32 c:\windows\system32\atl.dll" command fixed the corrupted information concerning the registration state of atl.dll, and fixed the registration problems with the two other dll's as well. Strange if you ask me, but hey... it works.