NL don't work on vista well

i have installed NL on vista but everthing is slow the creator program riding a coaster (4fps) and the menu are dead slow.
any one know the problem?

My guess would have to be Vista. Driver support is a little etchy right now for it, yes there are drivers for Nvidia and ATi but they are beta and nothing is finalized.

Stick with XP or 2000, or if you want 64bit use XP 64. Wait on vista to come out and get the bugs out of the system.