I backup to a couple of external USB drives and when finished I always click on the Safely Remove Hardware icon in the system tray. I almost always get a message that says "Windows cannot stop your 'Generic volume' device because a program is still using it. Close any programs that might be using the device and try again later." I can't find any processes that might be still using the drives and I have tried disabling Vista's indexing and shutting down my AV and I still wind up having to shut down my laptop to disconnect the drives. Is there a solution to this?