"Unsupported Media Format" error

Yesterday I find that my M8 can't play many files that previously worked without problems.
It happens in video and audio formats; AVI, MP4 and FLAC doesn't work.
I cleared the register and worked again...but I installed some aplications and the error returns.

Error in videos:



Error in music:




Any idea about this? I supose that maybe it's caused by a third party aplication or something...

Have you installed TCPMP by any chance? If you did it probably changed the file associations in the system, so uninstall it, and clear the registry.

Thanks! Curiously, I formated again my M8, installed everything, and now video works but FLAC no :S (and yes, I installed again TCPMP player 'cause I want to know if this software it's exactly the problem).
I will try more things...
If I can know what exactly is the problem and what the solution, I will post that here

good luck~~

All working again :D
The problem with the music actually was a wrong playlist file FLAC works well !
Thanks for all the help :D!