It appears that no matter what I try, Windows 7 will not use FFDShow. This has become a problem as some of the videos I am trying to watch will not render properly with Windows media Player, or Windows Media Center. Media Player Classic Home Cinema will not render anything and I get the same result with the iMedian software that came with my HTPC case. when I run graphedit, FFDShow does not get used in the rendering path either. I am running Windows 7 professional x64. I have tried every guide I can find, I have tried the 32 and 64 bit versions of FFDShow. I have tried the 32 and 64 bit versions of MPC-HC. It's possible that the AVI files really want a Matroska, but I already tried installing what I could find based on what I found via Google. Besides, WMP and WMP can play the videos, but they do so with a ton of blocking artifacts and glitches. My XP box plays them just fine and has no trouble creating graphs that use FFDShow. Am I at the point where I just need to write off Windows 7 as total crap I wasted my money on?