User Data Storage (UnistoreSvc) Service Defaults in Windows 10

Handles storage of 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 Storage
Service name:UnistoreSvc
Service type:user share process template
Error control:ignore
Path:%SystemRoot%\System32\svchost.exe -k UnistackSvcGroup
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UnistoreSvc
  • SeImpersonatePrivilege
  • SeCreateGlobalPrivilege

Default Behavior

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


While User Data Storage is stopped, disabled or working incorrectly, the following services do not start:

Restore Default Startup Configuration of User Data Storage

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config UnistoreSvc start= demand

3. Close the command window and restart the computer.

The UnistoreSvc service is using the unistore.dll file that is located in the C:\Windows\System32 directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.