Windows 7 has some fine in-built diagnostic tools to help you trouble-shoot Windows Media Player issues, which you may be facing.
To open these specific troubleshooting & diagnostic modules do the following:
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.
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.
Type msdt.exe -id WindowsMediaPlayerDVDDiagnostic in Start Search and hit Enter to open the troubleshooting wizard which will help trouble-shoot DVD playing problems.
Also see our utility, Fix WMP which re-registers all concerned dll’s required for the smooth functioning of Windows Media Player and FixWin, which has fixes for some specific WMP problems.
These links may also interest those looking for ways to troubleshoot Windows Media Player:
Windows Media Player Solution Center
Windows Media Player – FAQ
Windows Media Player – Troubleshooting KBArticles
Troubleshooting Windows Media Player Error Messages
Fix: Windows Media Player is not installed properly and must be reinstalled
Fix It solutions for Windows Media Player.
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