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What is Mobsync.exe and Why Is It Running?

You’re probably wondering what the mobsyc.exe process is doing running in Task Manager or why there’s a green and yellow icon in the Notification Area. Here we will take a look at what it is, and how to disable it if you don’t use the feature.

Note: This process disables the Offline Files feature which is not available in Home versions of Vista or Windows 7

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What Is It?

Mobsync.exe is a process that belongs to Microsoft Sync Center and the Offline Files feature. It’s associated with a device like a Windows Mobile phone with ActiveSync, a SQL Server installation, or if you have Internet Explorer (a feature in IE 6 not in IE7 or above) set to synchronize pages for viewing offline. The process is not a threat and shouldn’t be deleted if you’re using the feature. If you go into Control Panel, you can launch Sync Center and manage its settings.

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If it gets activated for using Offline Files, it will show up in the taskbar in Vista and Windows 7.

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How Do I Turn it Off?

So you’re  not sure how the heck it got turned on, and want it off. You could go into Task Manager each time and end the process, but that is extremely annoying.

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Disable mobsync.exe in Windows 7

Click on the Start Menu and enter offline files into the search box and hit Enter.

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In the Offline Files window click the Disable offline files button then click Ok.

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You’ll need to restart the computer for the new setting to take effect. After a reboot, the Sync Center icon should be gone and not be running in Task Manger.

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Disable in Vista

Open Control Panel and select Network and Internet.

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Next click on Offline Files.

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

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A restart is required and after that, it should be disabled and you won’t see it in the Taskbar or running in Task Manager.

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If you have a home version of Vista or Windows 7, you will see mobsync.exe running in task manager, but closing out of Sync Center should stop the process. If you were using Sync Center and ActiveSync to manage a mobile device and no longer need it, you can uninstall ActiveSync software and it should stop mobsync.exe as well.

Lowell Heddings, better known online as the How-To Geek, spends all his free time bringing you fresh geekery on a daily basis. You can follow him on if you'd like.

  • Published 01/5/10

Comments (13)

  1. Sly

    My mobsync.exe appears out of nowhere in the task manager, I’ve tried your solution (ie: disabling it through control panel -> Network & Internet), but I dont have a “folder” that says “offline files”… the only thing I have when I go to Network & Internet is the Sync Center icon. When I click on it, I get to see 3 of the same icon to resolve conflicts, setup a new sync and a third one that I dont remember atm…

    Is there another way to disable it… I’m thinking in going through services.mc to disable it… what’s your thoughts on the matter and do you have any other alternative to solve this issue?

    I appreciate any help you’re willing to give me.

    Sly

  2. Renee

    I have the exact same problem as Sly.

  3. Meredith

    I have the exact problem. I’ve tried disabling Windows Portable Device. I don’t have any syncing software installed. I’ve even uninstalled Windows Live . This is extremely frusterating. Like the two scenarios above me, I do not have an offline files option anywhere.

  4. Meredith

    Oh, there is no Mobsync in my services.msc either.

  5. Jay

    Have you tried start/run/typing msconfig/hitting enter/clicking on startup/unchecking mobsync/apply/ok?

    If you are in XP that will do the trick.

    Even if you get an error message, keep clicking ok. When you restart your computer, you will see a prompt. Click ‘don’t show this on startup’/ok.

  6. joe

    useless guide. invalid for vista and XP. /fail.

  7. Ralph Steadman

    Still using Vista or XP. /fail.

  8. Mr. Jones

    Acting like everyone should upgrade to Windows 7. /fail

  9. Mr. Andersen

    All i did was to run msconfig -> click tab(Services) and then find
    offline files(its renamed if u’ve got another language installed) so just look in the list and u will find it..
    remove the marker
    restart computer

    all done
    should work on all computers

  10. Byron Pratt

    Don’t think I have seen this ‘service’ before but noticed it in Process Explorer while looking for something else. After looking it up and trying to apply the ‘fix’ it simply disappeared/turned itself off/beats me. Of course, am running Vista, the operating system that can’t even run its own games without a general FAIL. And if someone thinks I should upgrade to 7, send me a valid copy and I will do so. Otherwise, I ain’t throwing money at M$ no mo’.

  11. Tom

    In XP, go to your “start” button, click “run”, type msconfig. Go to the start up tab and deselect the “mobsync”. Restart.

  12. 84user

    This advice from Microsoft might help Vista users that are still trying to disable mobsync:

    http://answers.microsoft.com/en-us/windows/forum/windows_vista-performance/why-does-mobsyncexe-keep-running-wmplayerexe/5d9f40d6-6414-4930-9c32-c1ef62b58115

    The symptoms match mine (minus the popup): mobsync appears closely followed by wmplayer in the process list and then both disappear. I started noticing this after the most recent Windows Update on my Windows Vista Home Premium, but that might be coincidence. Each time I tried to disable WUDFHost, both mobsync and wmplayer would appear and disappear. After three kills, WUDFHost stayed dead. I am in the process of permanently disabling or uninstalling all “Windows Live” stuff.

    SC tells me that “Portable Device Enumerator Service”‘s name is WPDBusEnum and that its state was “RUNNING (STOPPABLE, NOT_PAUSABLE, IGNORES_SHUTDOWN)”.

    In my Vista Home Premium there simply is no offline file folder; only the “Synchronizing center” is in the control panel, or can be called via “mobsync”; the control panel has no stop button; “Manage offline files” is not in the list of items mobsync lists; “sc config CscService” reported that there is no such service (see http://offlinefiles.blogspot.com/2010/10/offline-files-service.html).

  13. chamorga

    Search for mobsyc, open the location, take ownership of the file, add full rights to the file with your account and rename it.
    You will have to close the security box after taking ownership before you can change permissions.

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