When I video call my friend on skype, my video is blocky on his new PC. It's like 3 lines of my video all out of place. I've never had a problem skyping him before he got his his new PC.
He is running DirectX 11 and has just updated his graphics drivers.
Whew. All of a sudden it seems like the same problem is popping up like whack-a-mole.
That problem is typically caused when running an nVidia display adapter and driver version 285.62. If that's your configuation, there are two things you can try to fix the problem.
1) Update to the latest beta driver from the nVidia website.
2) Try the solution that worked here: