11-14-2012 08:28 PM
Sounds like a corrupted file. You should be able to clear it by doing a reset on the player. With the unit on, press and hold the power button for 20-30 seconds. It's likely to shut down earlier, but even if it does, continue holding the power button down for the full count.
Release the button, then press it again momentarily to power up the player. With any luck, it should start up normally. You should now be able to plug it into your computer and run ChkDsk to check for and fix any corrupted files. If it asks if you want to save any strings as files, say no.