I gave up on getting a fix. I tried every suggestion I came across and sometimes I got a few days without a TDR failure, but it was only a temporary hiatus.
I found a resolution, though. I yanked my nVidia GeForce card and put in a newly purchased AMD Radeon. It cost me a hundred and a half, but it's rock solid. It's definitely worth the reliability and peace of mind.
I guess that's not a possible fix for you laptop guys, but if you've got a desktop and some extra money you can end the aggravation.