WMP Error: 0xC00D10B3

C00D10B3:  Windows Media Player cannot play this file

This error code means that Windows Media Player isn't seeing your internet connection.  It does not mean you are not connected, rather WMP is just not being told you are not connected. This can be caused by your web browser (Internet Explorer, FireFox, etc.) being set to “work offline”. 

To fix this problem, you can force Windows Media Player to assume it is connected to a network:

1.  On the ‘Tools’ menu, click ‘Options’.

2.  On the ‘Player’ tab, under ‘Player settings’, check the “Connect to the Internet (overrides other commands)” check box.

NOTE: The Internet Connection Wizard can also confirm the method you use to connect to the Internet.  To run this wizard, click Start>Run.  Type “icwconn1.exe” and then click ‘OK’.

There is a more information on this error and possible solutions to it here:

http://support.microsoft.com/default.aspx?scid=kb;EN-US;838101

Advanced users:  If you have a firewall, see the following Microsoft Web site to make sure that the correct ports are open:

http://www.microsoft.com/windows/windowsmedia/forpros/serve/firewall.aspx#PortAllocation