This is a known issue with intel graphics. I did a google search and found a thread on Intel's help board. Several people had different "fixes" for it. None of them worked for me. Do a search and you might get lucky. My old laptop died earlier this year. It worked great with DTV2PC. Apparently I didn't do enough research as there have been problems with the DTV2PC and intel on-board graphics.
I'm waiting for the wireless box to come out. It should be out in the next couple of months. That's how I'll watch shows and hockey games from now on. I will miss the DTV2PC app though. DTV no longer supports this app so this won't be getting fixed.