What is User Data Access_14d4fe service and how can I get rid of it?

This is the User Data Access (UserDataSvc)Service which allows apps access user data, including contact info, calendars, messages, and other content. Apps need such a service because apps run in a sandbox and can't access the data the way like desktop applications would do it.

Leave it running and ignore it, sooner or later you'll run into issues when you stop the service.

• Description of that services (UserDataAccessRes.dll.mui)::

  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.

• If you really want to delete that service type this command in Command Prompt with administrator::

reg delete "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UserDataSvc" /F

It is highly recommended not to mess-up with Registry and Services.

See my reply here:

Strange, similar services running on my PC: are they viruses?

Duplicate services with names such as _xxxx are per-user services introduced in Windows 1709. They can only be disabled via the registry.