One way is to use control panel add and remove progs and then uninstall.
If that does not work this is the really hard way.
delete the windows media player 11 folder. (I cant remember wher eit is!) and then use a registry cleaner to remove all the registry entries to the player! This saves doing, it by hand but yu could do that as well!

Then switch off and restart and then install the latest version.

It is wise to set a restore point before doing all this.

Best of luck
M

mj thanks for that. I did as you suggested and cleaned the registry with more than one cleaner after the delete. Re installed WMP, re started the PC - same problem. "Windows Media Player is not ..."

hi, try to install the latest service pack for your OS.. check if it will help...

had the same problem. i solved it by getting a copy of windows media player,no the one that is installed by windows during install but the one download manually. maybe try that and i believe it'll work.