I am running Windows 2003 server (always 100% compatible with XP), and am using an SB Live value 5.1. I had version 3534 prior to updating to 3536. Since then, I've noticed that windows has seriously slowed down with the new drivers. Upon clicking on an mp3, winamp 2.91 takes 5 seconds to load, where it had been instantaneous with version 3534. Everything seems to be slower that accessing audio drivers... Cubase, tvtuner, etc. I have gone back to version 3534 and everything seems to load up normally (faster) again. Something bizarre too... when testing the speakers with version 3536, I would hear intermitten radio/tv signal feeds that would be audible with the speakers for about 1/2 a second every 5 seconds. I also had specific setting for my volume leves (partly because i have the front channel split to headphones which halves the volume level)... and do not know how to set it with the new dB channel sliders.