This has nagged me for soooo long! I use Winamp, which has its own context menu integration, and I find myself accidentally opening a folder to play in Windows Media Player all the time…
Leave my context menu alone! If you just let it go wild, every program in the world wants to install some option there. Windows Media Player not only puts itself there, but integrates itself throughout the shell. Actually removing this integration is surprisingly easy!
Remove WMP Integration:
1. Click Start
2. Click Run
3. Type in regsvr32 /u wmpshell.dll
4. Click Enter
Easy!
Thanks to Annoyances.org and especially to Tech-Recipes.com for this fix!
Williamo's Blog 
GREAT! thanks for the tip !
Thanks a lot it worked