Hi, i know you’ve started that thread for about a month before and i’m not sure if you were able to solve it by now. But anyway.
I just had the same problem and i was able to solve it by deinstalling some video playback software (like “video lanc” etc) i recently installed. Before installing them everything worked fine.
The problem can also depend on some video or audio codecs. It may help when you remove all unnecessary codecs (especially codec bundles)
Hope it can help anyone, greetings,
globoo