Ok heres my problem, I recently updated my O.S from windows 7 32bit to 64bit and until the update was able to stream and play mkv files through windows media centre on the 360. With the 64bit O.S I now get an error message after it tries to buffer on the 360 in windows media centre saying, Video Error: Files needed to display video are not installed or are not working correctly. Restart Windows Media centre or restart the computer.
Its really annoying the *&$#&*#&$#&$# out of me atm. Have tried removing installing different codec packs adding extra's, previous 32bit setup i used was the k lite codec pack, and atm on win7 x64 I have installed the k lite codec pack + the 64bit addon but still no luck, tried installing divx plus codecs ac3 codecs and all attempts = fail.
If any one has had this problem and knows of a solution please let me know, cause I dont particully want to revert back to 32bit O.S
(edit) It's definately an an 64bit problem both the 360's will not connect to this pc, though if i change the extender settings to a different 32bit windows 7 pc and share media through that it seems to work 100%.