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How to Start/Stop Diagnostic System Host service

Service name: WdiSystemHost

Display name: Diagnostic System Host


Description:

The Diagnostic System Host is used by the Diagnostic Policy Service to host diagnostics that need to run in a Local System 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 LocalSystemNetworkRestricted -p

CMD:
This method shows you how to Start/Stop Diagnostic System 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 System Host service:

net start WdiSystemHost

sc start WdiSystemHost


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


To Stop Diagnostic System Host service:

net stop WdiSystemHost

sc stop WdiSystemHost


To change Startup type:

Automatic:

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

sc config WdiSystemHost start= auto

Manual:

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

sc config WdiSystemHost start= demand

Disabled:

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

sc config WdiSystemHost start= disabled

Automatic (Delayed Start):

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

sc config WdiSystemHost 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\WdiSystemHost" /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\WdiSystemHost" /v DelayedAutostart /t REG_DWORD /d 0 /f