Why does mobsync.exe keep running wmplayer.exe?

Hi Austin,

There shouldn’t be any problem by turning off Portable Device Enumerator Service. As stated earlier, this enables applications such as Windows Media Player and the Image Import Wizard to transfer and synchronize content using removable mass-storage devices.

For example, if you plugin a USB stick containing pictures, then you might not get the Image Import Wizard which upon clicking will import all your photos to your Windows Photo Gallery. So, the process is not automated and you need to manually import the photos to Windows Photo Gallery. Similarly, when you plugin a USB stick that contains music files, a wizard will pop-up that would ask you to sync the music files with Windows Media Player. You wouldn’t get that wizard and you need to manually sync the music files by opening windows media player and following the sync instruction wizard to sync music files.

If you don’t want to lose this functionality, then here is a work around that lets you disable mobsync.

1.      Click on Start menu and click on Control Panel.

2.      Click on Network and Internet.

3.      Next Click on Offline files.

4.      In the Offline Files window, click on the Disable Offline Files button and click Ok.

5.      A restart is required and after that, it should be disabled and you don’t see it in prosexp.exe

Hope this information is helpful.
Post your results back.
Mouneshwar R – Microsoft Support
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Hi Third_of_Five,

Check if you receive this pop-up message by booting into Safe mode?
1. Use F8 while restarting the computer.
2. Under Windows Advanced Boot Options, select Safe mode and press Enter.

If you do not receive any message, then restart the computer and perform a clean boot to find the culprit behind this cause.

How to troubleshoot a problem by performing a clean boot in Windows Vista
http://support.microsoft.com/kb/929135/en-us
Note: Do not forget to put the computer back to a normal startup once you’re able to find the conflicting software.

On further research on this issue, I came to know that mobsync is a Microsoft owned tool which enforces group policy for removable mass-storage devices. It simply enables applications such as Windows Media Player and Image Import Wizard to transfer and synchronize content using removable mass-storage devices.

If performing a clean boot fails to find the culprit, then follow the steps to disable mobsync.

1. Click on Start; in the start search type services.msc
2. Scroll down the page until you locate a service called Portable Device Enumerator Service, then double click on it.
3. In the General tab, change the ‘Startup Type' to Manual.
4. Click on the Stop button, and then click on OK.
5. If prompted by UAC (User Account Control), select Continue.

Now restart the computer and check if the issue persists.

Hope this information is helpful.
Mouneshwar R – Microsoft Support
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Visit our Microsoft Answers Feedback Forum and let us know what you think

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[If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]