Try rebooting. Try reinstalling.
Done x2.
Video will play now, but audio has wierd problems:
- in WASAPI exclusive access to my Marantz SR7010, the only audio that plays is DTS-MA (stereo and Dolby Digital won't give sound).
- in DirectSound mode, the only audio that will play is stereo.
Previously working setup was WASAPI. No change, except MC updated.