Actually they might have regardlessly clicked the NO button on the warning message that states:

"Windows Media Player yadda yadda yadda might not be able to play this file yadda yadda yadda Would you still like to Windows Media Player(11) to play file yadda yadda yadda?"

And they might have also clicked the tick-box saying not to show that message again.

and THUS!it never played mp3 files again Cause really if they didnt Tick on the box then they still have an option if they'd play the file But nevertheless WMP(11) can play mp3.

it just warns you that it MIGHT NOT support the file type cause its made to play WMA file

MORAL LESSON!!!
Read messages carefully. Take the risk CLICK YES on that message if you want to play mp3 files.

Hope its not as jumbly as my literary works
And more importantly HOPE IT HELPED.

WOW...TNK U BILBY..I USED K-LITE CODEC PACK..IT REALLY REALLY WORKS!!!! IT SOLVED MY PROBLEM~~

TNK U ALSO TO THIS SITE..GODBLESS..PLS CONTINUE TO HELP OTHERS LIKE ME..=D

i am using compaq presario sr1620il. it doesn't have dedicated graphics.in my pc there is only 128MB onboard graphics memmory still i get superb video output by nvidia decoder and intel chipset 915 old one.