Win7 thread

This is just a thread to talk about weird Win7 stuff and problems. I can't answer any of them, but if you notice stuff that is different from WinXP that could screw up some games and stuff, please point it out.
I'll start:
WTF does this mean?
"I get weird mouse acceleration on Win7 for no reason. Looks like my XP mousefix is not working"
__________________________