Audi? More like a Rube Goldberg garbage truck.

Fits and starts, freezes in its tracks, groans and wheezes like a rusted steam calliope, heavyweight fuel hog, repair parts quickly go out of stock forever so you need to constantly rebuild it on the fly. And when the Framework breaks it can't be repaired.

How to repair the .NET Framework 2.0 and 3.0 on Windows Vista applies to Vista and all later Windows versions. Short summary: "Here's some stuff you can try, but you'll probably have to reinstall Windows from scratch."