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Error 193 0xc1 when trying to start Windows Audio Endpoint Builder and Multimedia Class Scheduler

Applies To: Windows | Windows 7 | Hardware and Drivers

I am running Windows 7 Starter on a Dell Mini 10V. This morning my sound seemingly randomly stopped working after I took the battery out of the powered-down mini 10v and then placed it back in. I attempted to use services.msc to start the Windows Audio service, but it tells me services it depends on aren't running. All services it depends on will run except Multimedia Class Scheduler and Windows Audio Endpoint Builder.

There is a red X over the speaker icon in the bottom right system tray, and it claims there are no audio devices installed and that the audio service isn't running.

I am looking for help fixing this. I ran sfc /scannow, and it told me some files are corrupted but I cannot decipher the output log. I do not have an optical drive because this is a netbook, and I can guarantee I don't have any programs running on this computer that could have disabled the sound because I have the same programs on all of my computers.

Has anyone seen a problem similar to this? I ran system restore, but it did not fix the problem. There was only one restore point for this morning, and I think it was created after the problem. It claims there was a "critical install" or "critical update" to my high def audio device which I had nothing to do with. Please only respond if you have truly helpful insight. Thank you in advance!

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casuallyewing

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Answer

Hi casuallyewing,

Welcome to Microsoft answers!

Generally the error message means that the service manager couldn't find the exact .exe path to run the service. Sometimes, the service is installed from a directory with multiple words for the directory name. So the registry path to the service needs to be placed with double quotes.

Click ‘Start’ and type ‘services.msc’ and hit Enter

Check for the multimedia class scheduler and audio endpoint builder service.
Check for the path under "path to executable:" for both the services. Make a note of the same.
Also make a note of the service name for both the services.

The services are as follows:

AudioEndpointBuilder - AudioEndpointBuilder
Multimedia Class Scheduler - MMCSS

Now, let’s check if the paths under these two services are the same as well in the registry.

Click ‘Start’, type regedit and hit Enter

Locate the following key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\

Under services, check for these services: MMCSS and AudioEndpointBuilder.

Corresponding to the above two services, the Image path (on the right pane) should be same as the path in ‘services.msc’

Let us know if the path matches for further troubleshooting.

Regards,
Gokul - Microsoft Support

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Gokul T

Support Engineer

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Thanks Gokul...!!! I used the following part of your response for resolving the Windows Service issue..

Error that i received....
"Could not start the Windows service on Local Computer.Error 193: 0xc1"

Today morning customer was asking me to restart a window service.... i stopped the windows service. Service stopped.

When i tried starting the service... windows services was not starting up properly.

after reading through your message... i found that there was C:\Program and C:\Program Files...

as you said... Windows service while starting not able to figure out exact path of .exe service.

i renamed that SCRAP C:\Program to C:\Program1 and now my windows service is able to get into C:\Program Files... and start the service and execute the correct .exe file.

Thanks again for your response....

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Bharath.P

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Hi casuallyewing,

Welcome to Microsoft answers!

Generally the error message means that the service manager couldn't find the exact .exe path to run the service. Sometimes, the service is installed from a directory with multiple words for the directory name. So the registry path to the service needs to be placed with double quotes.

Click ‘Start’ and type ‘services.msc’ and hit Enter

Check for the multimedia class scheduler and audio endpoint builder service.
Check for the path under "path to executable:" for both the services. Make a note of the same.
Also make a note of the service name for both the services.

The services are as follows:

AudioEndpointBuilder - AudioEndpointBuilder
Multimedia Class Scheduler - MMCSS

Now, let’s check if the paths under these two services are the same as well in the registry.

Click ‘Start’, type regedit and hit Enter

Locate the following key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\

Under services, check for these services: MMCSS and AudioEndpointBuilder .

Corresponding to the above two services, the Image path (on the right pane) should be same as the path in ‘services.msc’

Let us know if the path matches for further troubleshooting.

Regards,
Gokul - Microsoft Support

hi Gokul,

I'm having same problems which I'm still unable to solve. I tried what you said and I got different image paths for MMCSS and AudioEndPointBuilder:

Please what is the next step?

Regards,

Oyesola

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Oyesola

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It still doesn't work,

It is the same path...

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chevamoooooooooooooooooooooooo

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I am having the same problem, on my Asus g71gx. in both cases, the paths are the same, except in the Regedit, it starts with %SystemRoot%\System32......Not knowing anything about computers, I am not sure if this is a problem. I am just now attempting a reinstall of my drivers, but as of now when I try to start both programs I get a Error 193: 0xc1 message.

I would greatly appreciate some feedback, it's been driving me nuts.

Thank you!

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AstreaCeleste

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the two MMCSS and AudioEndPointBuilder Image path are same as the path in ‘services.msc’

but still i got the same error 193 0xc1 when i try to start the service Windows Audio EndPoint Builder and Multimedia Class Scheduler.

please help.

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rajacs41

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The paths on my computer do match... what needs t be done now?

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rosspent

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Solutions - How to Fix Windows Error 193

Repairing Windows error 193 isn't as easy as reinstalling software that is showing errors. Apple uses a shared repository of files for all it's software called Apple Application Support, and if this application is damaged or corrupt then it will generate Windows errors when you try to start iTunes and other Apple software. Unfortunately there is no direct way to repair Apple Application Support itself, but you can reinstall all Apple products on your computer, and then reinstall iTunes. This will replace Apple Application Support with good files.

In order to do this, you should find all Apple software on your computer such as iTunes, QuickTime and MobileMe, and install them from the control panel. Uninstall them completely before doing a reboot.

When your computer has restarted, you should manually check to be sure all Apple related software has been removed by checking your Program Files folder. Folders to look out for are called:

Bonjour

Apple

iTunes

iPod

QuickTime

QuickTimeVR

Once you have checked these folders have been removed, it is recommended to check your Windows stability to detect any potential system error.

Following this, you can then reinstall your Apple software and verify correct operation. You may want to start with one application first, such as iTunes, as this will reinstall Apple Application Support. Check that everything works correctly and you are not receiving any further instances of Windows Error 193 before proceeding.

for more information Fix Windows Error 193 (iTunes)

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shallyd

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