WMP 9:
Microsoft Windows Media - Troubleshooting Windows Media Player 9 Series Error Messages
Error code information for Windows Media Player 9 Series
Windows Media Player error codes
WMP 10:
Microsoft Windows Media Player - Troubleshooting Windows Media Player 10 Error Messages
WMP 11:
Common troubleshooting tips;
Troubleshooting
Microsoft Windows Media - Troubleshooting Windows Media Player 9 Series Error Messages
Error code information for Windows Media Player 9 Series
Windows Media Player error codes
WMP 10:
Microsoft Windows Media Player - Troubleshooting Windows Media Player 10 Error Messages
WMP 11:
Common troubleshooting tips;
Troubleshooting