Download "K-lite codec pack", go to ffdshow and disable trumotion handling.
I think that's what fixes it.
I had the exact same problem
EDIT: i should be more specific.
once you have downloaded the K-lite pack, go into All programs, scroll over to K-lite, scroll to the configuration option, go to ffdshow video decoder, and THEN disable trumotion handling.
It might just say "trumotion" or "truhandling"