Цытата с одной внутриконторской доки:

1. Use our advanced, high perfomance, accurate uninstall utility:

c:\>del CompanyName.ProductName.*.dll /s

2. We also have a ultra cool installation detection utility to find old versions:

c:\>dir CompanyName.ProductName.*.dll /s

P.S. In a special deal of Microsoft they agreed to include these advanced installation utilities in future versions of windows