the gpsvc service failed the sign-in. The Universal Unique Identifier (UUID) Type Is Not Supported.

FIX : The Group Policy Client Service Failed The Sign-in. The Universal Unique Identifier (UUID) Type Is Not Supported.

1. Press + R and put regedit in Run dialog box to open Registry Editor (if you’re not familiar with Registry Editor, then click here). Click OK.

2. In the left pane of Registry Editor, navigate to following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\gpsvc

3. Here, at this registry location, you need to take ownership of gpsvc key. You can adopt either of these two ways to take ownership:

• Take ownership instantly using RegOwnerShipEx

• Take ownership manually

4. Once you’ve successfully taken ownership of registry key, close Registry Editor. Open elevated or administrative Command Prompt and type following command, hit Enter key then:

reg add “HKLM\SYSTEM\CurrentControlSet\Services\gpsvc” /v Type /t REG_DWORD /d 0x10 /f

You must receive “The operation completed successfully” message. In case if you’ve not taken ownership of the registry key mentioned in step 3, the command will not execute and you’ll get Access is denied message.

So by executing the command successfully, we force the GPSVC to initiate as a separate process from the beginning rather than to act as shared process. Thus now GPSVC can communicate correctly with Winlogon and there is no error during sign-in process, hence user logon becomes successful.