How to Start/Stop Diagnostic Service Host service

Service name: WdiServiceHost

Display name: Diagnostic Service Host

Description:

The Diagnostic Service Host is used by the Diagnostic Policy Service to host diagnostics that need to run in a Local Service context.  
If this service is stopped, any diagnostics that depend on it will no longer function.

Path to executable:

C:\WINDOWS\System32\svchost.exe -k LocalService -p

CMD:
This method shows you how to Start/Stop Diagnostic Service Host service from Command Prompt

Perform the following steps:

Please go to Start and click on the Type here to search

Type cmd, right click on cmd icon under the Programs and click on Run as administrator

Services Regedit CMD Msconfig

Please confirm User Account Control pop-up

Please select, right and copy a registry key from below, then right click on command prompt window, select Paste and press Enter

To Start Diagnostic Service Host service:

net start WdiServiceHost

sc start WdiServiceHost

Note: You can’t start a service if Startup type is on Disabled.

To Stop Diagnostic Service Host service:

net stop WdiServiceHost

sc stop WdiServiceHost

To change Startup type:

Automatic:

REG add "HKLM\SYSTEM\CurrentControlSet\PerfHost\WdiServiceHost" /v Start /t REG_DWORD /d 2 /f

sc config WdiServiceHost start= auto

Manual:

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

sc config WdiServiceHost start= demand

Disabled:

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

sc config WdiServiceHost start= disabled

Automatic (Delayed Start):

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

sc config WdiServiceHost start= delayed-auto

Note: When you change to Automatic (Delayed Start) a new key DelayedAutostart is created with value 1.

REG add "HKLM\SYSTEM\CurrentControlSet\services\WdiServiceHost" /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\WdiServiceHost" /v DelayedAutostart /t REG_DWORD /d 0 /f