Disable AutoUpdate

Hello Community!

How can i disable the automatic updates of Acrobat Reader DC.

I disabled an prooved:

- AdobeARMservice in services.msc

- Adobe Acrobat Update Task in taskschd.msc

- HKLM\SOFTWARE\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown - bUpdater --> 0

But there are still some Clients, where the update iaskscheduler reactivates. But why? I can't figure it out.

Thanks fpr help!