User Data Access (UserDataSvc) Service Defaults in Windows 10

Provides apps access to structured user data, including contact info, calendars, messages, and other content. If you stop or disable this service, apps that use this data might not work correctly.

Default Settings

Startup type:Manual
Display name:User Data Access
Service name:UserDataSvc
Service type:user share process template
Error control:ignore
Object:LocalSystem
Path:%SystemRoot%\system32\svchost.exe -k UnistackSvcGroup
File:%SystemRoot%\System32\userdataservice.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UserDataSvc
Privileges:
  • SeImpersonatePrivilege
  • SeCreateGlobalPrivilege

Default Behavior

In Windows 10 it is starting only if the user, an application or another service starts it. If User Data Access fails to load or initialize, Windows 10 start up proceeds without warnings. However the error details are being logged.

Dependencies

User Data Access cannot be started under any conditions, if the User Data Storage service is disabled.

Restore Default Startup Configuration for User Data Access

1. Select your Windows 10 edition and release, and then click Download.

2. Save the Win10_UserDataSvc_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The UserDataSvc service is using the userdataservice.dll file that is located in the %WinDir%\System32 folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.