I have checked through this site and tried installing the System Update Readiness Tool and all the relevant "Fix It" utilities I could find and none fix the problem. I'm about to try uninstalling the latest Windoes Update patch to see if that fixes the problem but would like a better solution if one exists.
This is a Windows 7 Ent. x64 system and a fresh install of the OS. Dual-Core Intel 2.67 GHz processor with 2 GB RAM.