The red light is off and the reader is dead...

I've been using mine for about a year with no problems, try plugging it into a different USB port. Windows will probably reinstall the drivers and this will reset the fingerprint reader. If it doesn't come back on then, you're probably gonna need a new one. Also, check the system tray icon for the fingerprint reader. Hover your mouse over it. If it says that the reader is connected, chances are that red light just somehow isn't working. You could try taking the whole thing apart and looking at the red light to see if there's anything unusual around there.