Quote Originally Posted by baobaosun View Post
Sorry, I forgot my ticket#. I was referred to the forums when live support couldn't resolve. I tried everything they had advised in the support and on other sites. I reinstalled, clean boot, update drivers, check for updates for OS, delete folder from My Games, and also try DX9 instead of DX11.

It happens whenever I experience heavy loads of particle effects as black squares replace particles during raids or any combat related content. No other game has this problem.
Do you run in fullscreen? I've had this problem in fullscreen but borderless works perfect, sadly borderless runs the game worse and other issues, but fixes crashing.