I've encountered error message C00D11CD while using Windows Media
Player. How do I fix this quickly. Thanks.

The most likely cause is that something has gone wrong with the
special file responsible for the "encoding". The name of the file is:
wmadmoe.dll

The first thing we need to do is re-register this file with Windows
XP. To do this go to the "Start Menu" and select "Run". Now type in
the following: regsvr32 wmadmoe.dll


If this does not work then the file itself may be corrupt. To fix this
go to the "Start Menu" again and select "Run". Now type in the
following: sfc /scannow

This will now scan your XP machine to see if there are any corrupt
system files. If there are any then XP will prompt you for the XP CD
so it can get a new copy... This may help you resolve the c00d11cd
error.

NB - This will get you up and running again, however due to some
underlying problems with your installation you may actually need to
re-install Windows Media Player.

according to microsoft this is the solution

http://support.microsoft.com/?scid=kb;en-us;q230687

thanks
jake