VMWare version 6 beta has a feature that integrates with Visual Studio 2005 debugging. This seems to have a problem with VS2005 right now. I'm running Vista but don't know if this is part of it or not.
The message you will see when opening VS2005 involves an error writing to a log file.
If you reinstall VMWare, choose modify, and unselect the option for the VS add-in, you'll be fine.