Thanks for your reply! I know that NT4 does not support USB. But there are tricks to enable it, some software can emulated drivers for that. Like I do for infrared. (Quickbeam) But the soft I'm using, does not support USB. Maybe I just have to wait until IBM wake's up :-) I'll be happy when we start the XP rollout project here, but migrate 15000 computers will be a long job And finally get rid off NT4!