Disable Single click using group policy not working

Hi Guys:

I have noticed some of our workstation has single click to open enabled for a AD group.

I am trying to turn it off by using group policy.

I have disable the group policy: User Configuration\Policies\Administrative Templates\Windows Components\Windows Explorer\Turn on Classic Shell

Also set the registry key: HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ Explorer \ClassicShell to 0

But after that users belongs to that group still have single click to open feature.

I have checked group policy applied to that group other than the one I have setup there is nothing to turn on Class Shell.

Am I missing something?



Thank you all very much