Well, I have downloaded a little clip from the internet... Thing is, it said I needed DivX & AC3, which I have downloaded.

Now, the problem is:

• Selecting it with windows explorer causes explorer.exe to use all my CPU.
  
• Opening it with WMP gives me the "error while opening, you need more codecs" error.
  
• DivX player just doesn't respond and doesn't close until you terminate the process.
  
• Winamp just stays stopped if you Play it.

Sounds like it's corrupt and/or not a real AVI file. Try converting it with some kind of video converter such as 3GP Converter and if that crashes or doesn't work then I'd give up

hmmm, codecs packs & videolan are no use either... it's probably corrupt thanks anyway =(

what is the file extension?

filename.extension

here you go:

quote:

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Originally posted by Millenium_edition
Opening avi files with unknown codecs

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  A nice little program called AVICodec, open it up and select your video file, see what codecs it wants.

quote:

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Originally posted by Ddunk
  A nice little program called AVICodec, open it up and select your video file, see what codecs it wants.

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quote:

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Originally posted by Millenium_edition
I know it says DC50 as codec tag (someone sent me an app to see this)

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If videolan doesnt render the file, it has to be corrupt.
Also i would suggest looking into uninstalling various players you have such as DivX as Media Player Classic and VLC player will actually play the files a lot better than divx player or WMP.