You need to uninstall Windows Media Player first. You can try the following instruction below. Please note that I am not responsible if your computer crashes.
Click the START button and select Run.
Type in: regedit in the command box.
When the regedit window appears, expand the HKEY LOCAL MACHINE by clicking on the plus sign to its right.
Now Click on the plus next to SOFTWARE, then MICROSOFT, then WINDOWS, then CURRENT VERSION and finally UNINSTALL
When you expand the Uninstall folder, you'll see all the programs currently installed, such as the uninstall Media Player 10 or Media Player, etc.
Click on the folder you want to uninstall, in the box on the right you will see two strings:
DisplayName and UninstallString.
Double click UninstallString and a box will appear with the uninstall string highlighted.
Right click on the highlighted entry and select COPY.
Close the Regedit window.
Select the START button and click RUN.
Right click inside the command box and paste the uninstall string and click OK to uninstall Media Player.
Please repeat with me: "Levi is not responsible if your computer crashes. "
Goodluck.