User data access service terminated unexpectedly

After the installation of latest protection updates on Windows 10 / Windows Server 2016, users started to comordinary around persistent failures of the CDPUserSvc company. In this post we’ll look at what the CDPUserSvc organization is, why it periodically terminates unexpectedly, how to deal with this trouble and whether it is possible to disable this service in Windows 10 / Windows Server 2016.

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Service CDPUserSvc first appeared in Windows 10, and from the exceptionally beginning it causes users many inquiries and also creates a number of troubles.

Error: CDPUserSvc_xxxxx Has Stopped Working

Quite recently some Windows 10 / Windows Server 2016 users have actually began to comordinary about the following error that showed up at Windows startup, shutdvery own or even eexceptionally few minutes:

CDPUserSvc_xxxxx has actually quit working. A trouble led to the regimen to soptimal functioning effectively. Cshed the regime.


In the application log, the error favor this constantly appears:
Faulting application name: svchost.exe_CDPUserSvc_12cff5, version: 10.0.14393.0, time stamp: 0x57899b1cFaulting module name: cdp.dll, version: 10.0.14393.1715, time stamp: 0x59b0d38cException code: 0xc0000005Fault offset: 0x0000000000193cf5Faulting procedure id: 0x4484Faulting application start time: 0x01d35ebff3f9a7f5Faulting application path: C:WINDOWSsystem32svcorganize.exeFaulting module path: c:windowssystem32cdp.dllReport Id: f7159168-5104-440e-34c1-6b42ed6649eeFaulting package complete name:Faulting package-loved one application ID:


On Windows 10 computer systems, some individuals reported this error after the installation of Anniversary Update (1607) or Fall Creators Upday (1709). In this instance, you need to try to start the CDPUserSvc company in an isolated process or completely disable it (watch below).

In many cases, this bug is led to by the November upday KB4048953 upday for Windows Server 2016 and also Windows 10.

If you have actually this update installed, to remove the difficulty, it’s sufficient to effectively uninstall the KB4048953 upday (wusa.exe /uninstall /kb:4048953) or wait for the following cumulative update package, in which the bug should be addressed.

What is the CDPUserSvc Service?

CDPUserSvc implies Connected Devices Platform User Service. The complete name of the service is dynamic and also consists of the string CDPUserSvc_ and 5 randomly produced personalities (in my instance, it is CDPUserSvc_65bd2).

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In various Windows 10 builds, CDPUserSvc has a different startup type:

In Windows 10 1507 – manual startup;In 1511 the service is disabled;In 1607, 1703, 1709, 1803 – start form Automatic.

sc query| find "CDPUser"sc query CDPUserSvc_65bd2


The business is started in the svcorganize process: svchold.exe -k UnistackSvcGroup

The executable is %WinDir%System32CDPSvc.dll

It is amazing that if you open the consingle with the list of solutions (Services.msc) and uncover CDPUserSvc, you’ll watch that tright here is the following message in the description:

“Fairesulted in check out summary. error code 15100”


It is not clear why it happens.

I couldn’t uncover any official indevelopment from Microsoft about this business. If you analyze the CDPUserSvc relationships, you have the right to uncover that this organization regularly connects to Microsoft and OneDrive servers and sends out some data over HTTPS. Let’s check out what the procedures run in UnistackSvcGroup look like. To perform it run Process Explorer, open up svcorganize.exe properties and also look at them.

Five services are running in this process (please, note that every one of them contain the exact same 5-character identifier as CDPUserSvc):

CDPUserSvc_xxxxxOneSyncSvc_xxxxx – is responsible for synchronization of mail, contacts, calendar and various other user data;PimIndexMaintenanceSvc_xxxxx – is the call indexing business for quicker search;UnistoreSvc_xxxxx – stores structured user information (contacts, calendar, mail);UserDataSvc_xxxxx – gives access to the structured user information.


It is likely that CDPUserSvc is likewise responsible for synchronization of user data through MSFT servers. (Is it the telemetry? Do you really need it?) So CDPUserSvc might be disabled without any kind of damage to your OS (of course, if you are not making use of native Windows 10 contacts, mail and also calendar apps).

CDPUserSvc Isolation

Another solution that should resolve the trouble of consistent CDPUserSvc_xxxxx business crash is running it in an isolated mode. To do it, run this command in the elevated command also prompt:

sc config cdpusersvc type= own

ChangeServiceConfig SUCCESS


After that CDPuserSvc will begin in its own svchold.exe procedure. Check if the problem of CDPuserSvc faiattract persists. If it does, try to disable the company.

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How to Disable CDPUserSvc Service

If you speak CDPUserSvc_6b511 manually and collection it to Disabled in the Service Management (solutions.msc), it some time it will certainly resume aobtain (under an additional name).

Note. It is interesting that if you rerelocate this organization from the regisattempt, in some time it shows up aget under another name. The system tries to proccasion deleting this organization. (It appears, Microsoft uses the best techniques of virus developers