
Information
Windows 7 has some fine in-built diagnostic tools to help you troubleshoot Windows Media Player issues, which you may be facing. This tutorial will give you some steps to fix common problem you might encounter with Windows Media Player 12.
To open these specific troubleshooting & diagnostic modules do the following:

1. Type
msdt.exe -id WindowsMediaPlayerConfigurationDiagnostic in Start Search and hit Enter to open the troubleshooting wizard which will help you reset WMP to default settings.

2. Type
msdt.exe -id WindowsMediaPlayerLibraryDiagnostic in Start Search and hit Enter to open the troubleshooting wizard which will help make Media files show up in WMP library.

4. Type
msdt.exe -id WindowsMediaPlayerDVDDiagnostic in Start Search and hit Enter to open the troubleshooting wizard which will help trouble-shoot DVD playing problems.
5. You could also use the
Fix WMP Utility from thewindowsclub, which re-registers all concerned dll’s required for the smooth functioning of Windows Media Player.
6. Lets reinstall Windows Media Player 12
7. Click “Start” button, type “windows features” in the program search box and hit enter.
8. In the “Windows Features” dialog box, look for “Media Features” and expand it.
9. Clear “Windows Media Player” check box.
10. As soon as you clear the check box, you will see a pop-up saying that “The following Windows features will also be turned off because they are dependent on Windows Media Player.” The listed program is “Windows Media Center”.
11. Go ahead and click “Yes”. Windows will now begin uninstalling WMP12.
12. You to restart Windows for the uninstallation to complete.
13. Click “Start” button, type “windows features” in the program search box and hit enter.
14. In the “Windows Features” dialog box, look for “Media Features” and expand it.
15. Check boxes “Windows Media Player” and “Windows Media Center”.
16. Click “OK”. Windows will take some time in reinstalling them. Wait for the process to finish.
17. You to restart Windows for the installation to complete.
Hope this helps,
Captain