If you're not using Media Player 10, download it from Microsoft Update. Try googling "K-Lite Codec pack", downloading and installing it... then reboot.
If that doesn't work try switching it off and back on again.
To see what filetype it is, look at the file extension. If there isn't one:
1] Click MY COMPUTER
2] From the menubar TOOLS > FOLDER OPTIONS
3] Click the VIEW tab at the top
4] Untick the box HIDE EXTENSIONS FOR KNOWN FILE-TYPES
5] Click OK
6] Go back the the folder with your video in it and press the F5 key to refresh.
This will show all file extensions from now on.
|