Ok, clearly I did something wrong but I have no idea what.
None of my video editing software is playing back video. Audio works fine but Video is just plum not working, it won't even let me put anything in the video track. Not in WMM, not in Vegas Video 8.0, not even in Premiere Pro CS5, the first time using it.
I've tried converting MKVs to AVIs but receive the same problem, no video playback. Even partially worked on videos that were fine a few days ago refuse to play back video.
I'm using Windows Vista, 32bit and I downloaded CCCP and re-installed it thinking maybe some drivers needed to be updated but nothing changed.