Last Friday I installed the Windows Updates for November. Rebooted as usual, then as usual launched 7MC, slid out the CableCARD, waited 30 seconds, and put it back in the Ceton InfiniTV4 tuner. Everything as normal...
...But this time, I could not tune any channels. Channels up to #124
gave me an otherwise blank blue screen in Media Center (the EPG data showed up, but no picture), whereas channels above 124 gave an error message about not being able to tune to the channel.
The weird thing was that the Ceton Diagnostics Tool showed everything to be OK: CableCARD paired and authorized etc., tuners working just fine. Green check marks all around. I could even tune a channel via the diagnostics tool.
Except that I could not actually VIEW any channels. Several calls to Comcast yielded nothing -- one guy shunted me off to their Internet department even though I told him repeatedly that I don't get Comcast Internet service, and then he botched the forwarding and I got disconnected and had to start the whole rigamarole all over from scratch.
Finally, the last guy suggested that the problem might have to do with the Windows Updates. So I uninstalled them (thank you Bill G. for System Restore) and what do you know, WMC is back and working great again.
Now, though, I'm afraid to install any more Windows Updates. I know that some folks around here never update their WMC systems, but then we do use that PC to do some light Web surfing, occasional streaming, and to listen to Pandora. So unless persuaded otherwise I'd rather update the computer if it can be done without screwing things up.
When I get the time, I'll research last month's batch of patches to see if anything sounds like it could affect WMC. This is the first time anything like this has happened to us: in the vast majority of cases (for us) the culprit is a defective CableCARD. Has anybody else here run into this problem, where WMC was broken after the November 2014 Windows Updates?