It's almost brand new. Got Vista installed. My basic home recording set up is the same as I had on my old computer (4-5 year old with XP).
I use Cubase SX for the audio and ReWire Reason for the midi stuff - It's an easy and fast recording set up IMO. It worked super with the old PC, but with my new ultra-mega-powerful Vista PC the playback sound from Reason have half a second delay in time!!!! When I play Reason stand alone it's NO problem and when I record audio there's no problem either....
Anyone got a clue what to do?

both Reason and Cubase reacts immediatly on the midi input signal (the input midi signal marker reacts that is), but the output is delayed.
Please....help.....