Well, the "not installed correctly" message involves the Program
Compatibility Assistant, described here:
http://windowshelp.microsoft.com/Win...f4de71033.mspx

If you read the MSDN article that blog guy linked me to
(http://msdn.microsoft.com/en-us/libr...11(VS.85).aspx ), you saw
this paragraph that addresses the PCA:

Windows 7: Applications with Compatibility section will not get the PCA
mitigation.
Windows Vista (default): Applications that fail to install properly or crash
during runtime under some specific circumstances will get the PCA
mitigation. For more details, see the reference section.

Jane Fleming