Hey torrentg, thanks for your reply

.
I will check if there is any update for punkbuster when I'm at home later...
Avira is my Virus Scanner, free AV Avira Antvir 9.x. It's somehow weird that this
driver seems to be that old, because 9.x is the newest version which just recently had been released and should work fine together with Windows 7
Could an old (defintely strange and screwed up) USB-hub also be an issue ?
I also disconnected my not by Windows 7 supported Scanner, it was flagged with a yellow flag in the Hardware Manager.