I tried both ...
I went to update the TV card driver
and was told "Windows has determined that your driver is up to date".
I tried ending the process ehrecvr, got a window saying that ending it could damage the system, but clicked end process just the same, but it didn't end! I tried several times, but no luck.
Media Center still can't find the tuner!
Thanks anyway for the advice. Obviously no more watching TV on the computer for me.