This has gotten to be a really annoying problem.
None of my video files have been playing at normal speed! They're mostly avi files if that's any help.
I've tried reinstalling DirectX. They still play slowly. The only solution is to restart the computer and play the movies right when the computer has started back up. I haven't tried doing this after I reinstalled DirectX.
ATI Radeon 9250 (overclocked)
2.0ghz sempron
512mb ram
If anyone here can help me, I'd appreciate it very much.