Microsoft have certainly made the compatibility mode powerful in Windows 7!
I could only get basic use from my Zen Xtra in Vista, using Real Media Player to play tracks from the Zen Xtra, but in Windows 7 it works flawlessly.
Basically the driver for the Zen Xtra is incompatible with Windows 7...
audigy
beta drivers
compatibility
creative zen
drivers
firmware
incompatibility
installation
media player
mediasource
software
track
transfer
troubleshooting
update
video playback
windows 7
windows vista
