I wouldn’t rush to Best Buy… I would first uninstall the Sansa updater if you have previously installed it, reboot, and install a fresh copy of the Sansa updater - see here - http://kb.sandisk.com/app/answers/detail/a_id/156/kw/firmware/r_id/101834
Do all of this with the device disconnected from your PC. Only when asked to by the updater - hook up your Fuze to the PC, it should offer a new firmware, and I bet you after it installs, it will work like a charm…
LMK if this works.
