Windows could not connect to the Group Policy Client service (non-Admin accounts)

So, after having done an in-place upgrade from Windows 7 Prof to Windows 7 Ultimate, I could no longer log in with my unelevated-user-account. My Admin account worked fine. 

I was presented with this horrific screen:

GPC-Unable-to-Login

The answer for me was a missing registry key and some configuration--adapted from the source article below. In my case, GPSvcGroup was missing in the Svchost key and then the actual key was missing too with the 2 registry values needed.

Below is a summary of the SVCHOST tree changes needed:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SVCHOST

    GPSvcGroup REG_MULTI_SZ GPSvc

    GPSvcGroup (Key)
        AuthenticationCapabilities DWORD 0x3020 (12320)
        CoInitializeSecurityParam  DWORD 1

2018-07-30 15_00_19-Registry Editor


2018-07-30 15_01_04-Registry Editor


https://social.technet.microsoft.com/Forums/windows/en-US/e02a78e1-df44-415f-a2b7-7857c3bd8762/quotwindows-cannot-connect-to-the-group-policy-client-servicequot?forum=itprovistasecurity

How to disable driver signature enforcement in windows 10 permanently

1- Open an elevated command prompt instance.

2- Type/paste the following text: bcdedit.exe /set nointegritychecks on
                                  bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS ON

3- Restart Windows 10. 

https://answers.microsoft.com/en-us/windows/forum/windows_10-start/how-to-disable-driver-signature-enforcement-in/c3088094-0bb2-42ab-8d14-a82424d8bfc8

Windows 10 God Mode

Create New Folder and name it:    GodMode.{ED7BA470-8E54-465E-825C-99712043E01C}