I can not play audio files

I would suggest trying to install the latest version of windows media player,but if you are at work it may not be possible. Most companies try to block their employees from doing this at work. Thanks for using FixYa

Recognizing and Fixing Media Player Error Code c00d11b1

For the majority of Windows Media Player users who encounter the Media Player Error code c00d11b1 message, the problem only begins after they upgraded to 11. In other words, media player versions 9 and 10 worked perfectly well for them.

So, one option is to 'roll back' the player to a previous model that did not encounter any such problems.

To do this, initially go to Start, then Control Panel, and Add/Remove Programs. Next, click on the Windows Media Player 11 icon and click Uninstall.

It will ask if this is really the option you want to take. Confirm that it is, and then be patient as it may take several minutes for the operation to be completed. During this time, it may appear as if your PC has switched itself off, but it has simply deactivated all unnecessary extraneous computer operations, in order to retain memory and processing power for the job in hand.

Next, according to Microsoft, when this particular error code is encountered when trying to stream online video or audio, it most commonly indicates that the proxy settings for Windows Media Player are incorrectly configured.

This can be checked from the Tools menu within Media Player itself, after whch you need to click on Options. Then you must click the Network tab and in the Streaming proxy settings area, you need to verify your settings. If you're not sure what the correct settings are, first, click on Configure, and then in the Configure Protocol dialog box, select Autodetect proxy settings.

In some cases, you can also apparently encounter this problem if Media Player tries to receive an online stream by using the User Datagram Protocol (UDP), but for some reason, it cannot do so.

You may be able to fix this particular error by turning off this UDP option in the Player.

If these solutions are not effective, your problem may be something as simple as Media Player trying to access the wrong audio or video device on your machine.

Open Tools, select Options, and then select Devices. When this comes up, make sure that the correct audio for your PC is checked, and this could very well make your problem disappear.

If none of these operations is effective, then you may well need to check the underlying registry of your Windows operating system for defects and errors that may be causing Media Player to malfunction.

Almost inevitably you will find errors and defects in your registry whenever you run a thorough scan, and whilst it may not necessarily be possible to isolate a specific problem that is causing Media Player to malfunction, the cumulative effect could be the root cause of your difficulties.

If, therefore, you already have software installed on your machine that can scan and fix your registry for you, then you should use it.

If not, you can still avail yourself of a free online registry scan using proprietary software such as SpeedyPC. Whilst you will not be able to repair your registry errors without downloading and installing the full version of the software, nevertheless, the scan will indicate the extent of the problems that you have, and these problems may be what is causing you difficulties with Media Player.

Or download this software after downloading, install this software and try vlc media player. This will install (codec) compressor/decompressor for audio and video more supported multimedia.

Read this thread with the similar problems @ http://strom.wordpress.com/2007/04/06/windows-media-player-error-c00d11b1-solved/

Hope it helps.

Hi there,
There are different solutions on your problem here I did find some of them:

Try to use ccleaner and be sure that windows media player is checked :
http://www.ccleaner.com/

1: try to download this codek pack and install it :
http://www.free-codecs.com/download/XP_Codec_Pack.htm

2: it is related to updates your error you have to do this :
http://drmlicense.one.microsoft.com/Indivsite/en/indivit.asp

3: try to remove all the files from this folder- C:\Documents and Settings\All Users\DRM\- to a new subfolder and try this :
moving ALL the files in the folder: C:\ProgramData\Microsoft\Windows\DRM\ as well as the files in the “Cache” folder beneath that was the magic trick. I don’t know if you need to move from both folders, . Note that media player had to re-download the licenses. If it not work you can always return them from the folder back.

For more solutions please see here from the source link :
http://strom.wordpress.com/2007/04/06/windows-media-player-error-c00d11b1-solved/

Hope that helps
IF NOT then return here
Please rate my answer

Other support places :
http://www.microsoft.com/windows/windowsmedia/knowledgecenter/default.aspx

What Version of Windows Media Player do you have? If you have an older version, I would recommend upgrading to the newest version to see if this overwrites the existing problem..

Windows Media Player cannot play several files in the playlist. This might be caused by one or more problems.
To find information about the specific problems, click the Now Playing tab, and then click the blue or red icon next to each file in the List pane.
In some cases, you might encounter this error message if there is a problem with your sound device, such as a sound card or sound controller. For example:

• Your sound device requires an updated driver. To determine if an updated driver is available, see Windows Update or see the sound device manufacturer's Web site.
  
• Your sound device is not functioning properly. To troubleshoot the problem, see Windows Help and Support or refer to your sound device's documentation.
  
• You do not have a sound device installed on your computer. Install a sound device, and then try to play the file again
  

Hi,

Can you try this:

• Start-> Control Panel->Hardware and Sound
• Sound / Manage Audio Devices
• Highlight your audio device
• Properties
• Advanced
• In the Exclusive Media section, UNCHECK the box "Allow applications to take exclusive control of this device."
• Apply

Hope this helps.
Thanks.

Have you tried reinstalling the program?

http://www.microsoft.com/windows/windowsmedia/default.mspx

Choose Media player and let me know if you have the same problem again?

try to uninstall the software and then the soud card of your computer.. then attach it again and install the software.

Hi have you installed the correct software for your device