SOLVED: Can't play VC1 Codec total lockup

[gnattu]

Looks like the VC-1 DXVA exposed by your GPU driver has a bug which will hang your entire OS. I do recommend using native DXVA while disable VC-1 hardware decode if the CPU usage is reasonable because the non-native decoder has less features for the codecs that works. You can try update your GPU driver first though.