This is actually a problem with Vista itself, not the drivers. daniel_k's driver packs only fix this issue about 50% of the time, but I have seen some instances where other problems have cropped up . . . as well, the problem isn't pinned down to simply Creative's hardware, but ASUS, Auzen and HT Omega have had the same issues with certain applications . . . What happens - the audio processing in Vista is moved outside of the OS kernel, so the audio calls from the software are done at the application level . . . not the hardware level. Which means that Vista technically "interprets" the calls for the hardware and then passes the call onto the driver, which can result in strange behaviour (intermediate loss of channels, changing from 5.1 to 2.1, etc.) - unlike in XP where applications had direct access to the audio system. Strangely enough, applications that are integral to the OS once installed (i.e. Windows Media Player or Media Center) don't have these issues as often, it's actually very rare . . . and if you're using onboard audio instead of a card, the problem seems to never occur . . . My best advice - make sure you keep Vista as updated as possible. As well, make sure you've updated the OpenAL drivers. If you can, try to research and use only multimedia software that supports OpenAL (you'll have much fewer issues), instead of having to rely on Vista's 3 primary audio APIs. If you'd like to read some more of the nitty-gritty as to what Vista APIs do what, check out these links: Vista Audio API overview Windows Audio Session API MultiMedia Device APU Endpoint Volume API Device Topology API More info is available on Vista's audiostack on msdn - just browse around. As of now, my best advice would be to patiently wait and see how the daniel_k drivers hold up . . . but if trouble starts brewing again, you might want to attempt to start experimenting with different official driver packs . . . some seem to work better than others Well - we have answers here!