I just did the latest round of Windows 7 updates and rebooted my computer.
I noticed that video would not play. When I try to play video in Windows Media Player, it crashes:
When I try to play video in VLC player, it crashes:
I Googled this issue and found that people recommended changing your graphics card acceleration settings. To get there you right click on the desktop, go to screen resolution, and choose the advanced tab. When I do that, it crashes.
Here is some more info that may be relevant:
1) I can play video in Safe Mode in VLC player. Media Player will not load in Safe Mode, though. There's no error, it just doesn't load at all.
2) Since this started I have regularly been getting "Shockwave may have stopped responding" errors in Firefox. The window often disappears before I can click "Continue" or "Stop Script." I thought this may be causing the error so I uninstalled both Shockwave and Flash. I still cannot play video so it may not be related.
3) I used the MicrosoftFixIt tool to fix Windows Media Player. Windows said it detected some errors and fixed them, but I still cannot play video.
Since the problem is affecting every video player I try, I suspect it's with the video card. Media Player and VLC player will play audio files just fine, but they crash on video.