no, im running only win xp prof sp3 atm
imgur.com/S8CxTl8 (thats german)
i also tryed to uninstall 4.0 and installed all updates of net framework 1by1 (2.0, 3.0, 3.5, 4.0)
microsoft is also missing some files from framework 2.0 at the 4.0 installation.
ill noticed this because one game needed 2.0 and i had 4.0 and it didnt work xD