Diagnostic policy service could not start on local computer. access denied

getting error "windows could not start the diagnostic policy service service on local computer. error access is denied.

First, let’s check for the status of Diagnostic Policy Service and make sure that it’s set to Automatic.

1. Click Start, type services.msc in the Start search box and hit Enter.
2. Locate the Diagnostic Policy Service.
3. Right-click the service and select Restart.
4. Now, right-click the Diagnostic Policy Service and select Properties.
5. Under General tab, make sure the Startup type is set to Automatic.

You may now check for the dependency services for Smart Card and make sure that the dependencies status is also set to Automatic.

To check for the dependency service, right-click Smart Card and select Properties and click the Dependencies tab.

Make sure the dependency service is started and set to Automatic.

You may also try doing a System Restore to a point when the issue didn’t exist and check if that fixes the issue.

OR,

go to start ,search and type:- cmd, right click on returned cmd.exe and select "run as administrator" at the prompt type:-


net localgroup Administrators /add networkservice
press enter then type:
net localgroup Administrators /add localservice
press enter then type:
exit
press enter and restart your computer

Open services and make sure the service is started.