How to start or stop Group policy Client

Services:

Open run

Type services.msc

Open Group policy client

From General tab you can Start/Stop and change the Startup type of Group Policy Client

To finish press ok button and close Services window

Registry:

Open run

Type regedit

Please navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\gpsvc and 
locate Start registry key

Double click on Start and edit the value:

Change Startup type :

Automatic - 2
Manual - 3
Disabled - 4
Automatic (Delayed Start) - 2
When you change to Automatic (Delayed Start) a new key DelayedAutostart is created with value 1.
When you change to Automatic from Automatic (Delayed Start), DelayedAutostart change value to 0.

Command prompt:

Open command prompt

To Start Group Policy Client:

net start gpsvc
You can’t start a service if Startup type is on Disabled. 

To Stop Group Policy Client:

net stop gpsvc

To change Startup type with command line:

Automatic:
REG add "HKLM\SYSTEM\CurrentControlSet\services\gpsvc" /v Start /t REG_DWORD /d 2 /f

Manual:
REG add "HKLM\SYSTEM\CurrentControlSet\services\gpsvc" /v Start /t REG_DWORD /d 3 /f

Disabled:
REG add "HKLM\SYSTEM\CurrentControlSet\services\gpsvc" /v Start /t REG_DWORD /d 4 /f

Automatic (Delayed Start):
REG add "HKLM\SYSTEM\CurrentControlSet\services\gpsvc" /v Start /t REG_DWORD /d 2 /f

Note: When you change to Automatic (Delayed Start) a new key DelayedAutostart is created with value 1.
REG add "HKLM\SYSTEM\CurrentControlSet\services\gpsvc" /v DelayedAutostart /t REG_DWORD /d 1 /f

When you change to Automatic from Automatic (Delayed Start), DelayedAutostart change value to 0.
REG add "HKLM\SYSTEM\CurrentControlSet\services\gpsvc" /v DelayedAutostart /t REG_DWORD /d 0 /f

Msconfig:

Open run

Type msconfig

Go to services in msconfig window tab

Uncheck group policy client

To avoid Group Policy Client service from starting with the operating 
system using System Configuration