Media Player error C00D7159
After researching the issue you have encountered, we found the problem may
be caused by unsigned audio drivers on your Vista computer.
According to Microsoft documentation
Note: The audio engine does not normally load an unsigned sAPO. However,
signing is not done until the development process is complete and the driver
has been submitted to WHQL. For development and test purposes, the signing
requirement can be bypassed by setting the DisableProtectedAudioDG registry
value to 1, as shown in this example:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Audio
“DisableProtectedAudioDG” =dword:00000001″
Basically, a soundcard driver that you have installed on your system has an
unsigned sAPO which, to work, creates the above Windows Registry key. The key
is then causing the C00D11B1 error when trying to play files in Windows Media
Player 11.
WARNING: We strongly recommend that you back up the registry before making
any changes to it. Incorrect changes to the registry can result in permanent
data loss or corrupted files. Modify the specified keys only.
To backup (export) your Registry, please perform the following:
Click Start > Run > Type “regedit” without the quotations and press Enter
If using Vista?s original view, click Start>In search area, type regedit.exe
and press enter.
In the Registry Editor go to file -> export
Ensure that ALL has been clicked and enter the file name
(regbackup_date.reg, for example).
We recommend performing the following to correct the issue you are having.
We recommend following the below instructions VERY CAREFULLY.
1. Click on the Start Menu.
2. Type regedit into the Start Search box and hit enter.
3. If asked for permission, click on Continue to open the Registry Editor
4. On the left-pane, navigate to the following: HKEY_LOCAL_MACHINE, then
SOFTWARE, then Microsoft, then Windows, then CurrentVersion, and finally,
Audio.
5. In the right-pane, double click on the text, DisableProtectedAudioDG, and
change the value from 1 to 0.
6. Close the Registry Editor.
7. Restart your computer.
