Q: why can't i play .wmv file in quicktime even after i download codec from windows? can anyone help me wit this please!!!!!

What did you download?

If it wasn't Flip4Mac, then download and install that (there is a free version, so no need to buy the advanced versions).

is only one file or all files .wmv? just to confirm.

Have you done the obvious things to try to fix it: quit Quicktime then start it back up again, log out then back in, reboot.

Edit: Just read one of your later posts. If VLC won't play it, this is unrelated to Quicktime and Flip4Mac. Are you sure these wmv files are okay?

Did you try to open these files in another computer?

If the movie has DRM, then you can't play it on your Mac. I don't know if the paid version of Flip4Mac will play it.

However, I see later on you can't play any files in Quicktime? Is that any of your wmv's or any video file at all?

I am having this same problem.  I can play the files in VMware and on Windows OS with media player, but nothing on my mac side.  I have tried VLC player, QT7, QT10, DivX...audio plays but not video.  Installed codec, nothing works.