The play clock does not move -- Unit locked up

no idea except … trying your 80GB HDD instead ?

looking at your other Live SMP threads … you seem to having troubles with your 2TB

http://community.wd.com/t5/WD-TV-Live-Streaming/AVI-will-not-play-on-2TB-drive-but-will-play-on-80-GB-drive/m-p/591375

if a movie locks up and freezes … that can be a cause for the remote to stop responding (because the WDTV has locked up)

Have you done a CHKDSK on this 2TB ?