Im using WMP version 11 I think...will not play avi files....I have no probs with mpg DVD movie files.

Using XP and keep everything upsated to the latest if I can.

Power DVD is another one....wont work with avi, I cant think of the other 2 i have....but thanks anyway you 2 :)

*** edited to change to version 11 of WMP...I checked it***