hello malte.

birdie helped me with the same problem. what i did was i downloaded spybot - Search & Destroy (courtesy of the guys who made them & they're humble with their program), installed the program, run it & it did all the work for me. our problem is we got infected. that music-video file you downloaded may have caused it.

look for 'Birdie' & try to get in touch with him thru this forum. i hope we have the same problem because the solution worked for me.