I downloaded Process Explorer but there are so few processes running - none of which seemed relevant.

You mention few processes so you probably need to go to File -> Show Details for All Processes in order to actually see every process running on your system.

Did you perform a search for any of...

I have swapped cable providers in the past and it did not affect being able to play the old DRM recordings. I don't believe you should have to mess with Playready at all after the cable swap, so don't reset it or anything like that which COULD cause you to not be able to play back old recordings.

Have you considered that the problem is not the cable and is the graphics card?

Does the recorded video that you have problems with playback show the same problems if it is played back on another system that is using a different graphics card?

So if I run this and say NBC which for me is channel 188 comes back with -8.9dBmV and a Signal of 36.8 do I need to do something? Know the picture is jerky on this channel that we watch. Also watch CNN on 216 and that has a -7.5dBmV but don't think I notice it so much there.

randman: We're definitely neighbors! Yup, wait and see... ? I should note that early April a show on ABC began a recording with a notice (presumably from Comcast) that I was not entitled to watch it due to not being a subscriber. The show then shortly began recording anyway. I subsequently went to...

No one has any idea how to deal with this mspr.hds 2GB limit?

For now Ive made a script that stops Media Center service swaps the files back to the old one so my wife can watch things recorded before it hit the limit.
I assume the data for a show is not removed when the show is deleted and there...

This may not be related at all to your issue but I run Recording Broker on two PCs to broker recordings between the two PCs (surprise!) and, in recent years, found that garbage collection never completed if the Recording Broker service is running.
...

Interesting, the only thing I have running...

I was able to also confirm that decreasing the value by 1 pixel resolved the issue for me, I exported the Registry key and trimmed it down so that it just updates the single needed value.
I hope this helps someone else.

Regards

-----Copy the below contents into a text file, then save as a .reg...

I'm not sure if its included with what I shared but there is also an Unofficial V7 of the SDK.

I have a file called MCML tools that is the setup for it but I think you need MSVS 2010. I also have V6 of the WMC SDK, and the vista version. I believe the MSVS 2008 I gave you had some additional...

I found my issue; in case it may help anyone else. I use Norton 360 and I do have a traffic rule for the Ceton card network and when I recreated the rule Norton put the rule at the end and not thinking when I created, I needed to move the rule to the top.