Windows 10 - Update is required

Hello,

Actually I don't know that this is a right place to write about this, but please point me if not and navigate me where should I write this.

My problem is about Windows 10 Update Assistant. I work in a company where I wake on LAN about 60 PCs with Windows 10 installed. Every day I'm getting message: "Important updates are needed". I have tried to uninstall Windows Update with this steps:

1.) Turn off Windows Update service

2.) Turn off A smart background transfer service

3.) Added key to registry HKEY_LOCAL_MACHINE -> Software -> Policies -> Microsoft -> Windows -> WindowsUpdate -> AU -> AUOPTIONS set to 2

4.) Gpedit.msc turn off policies about automatic start windows update

5.) Task scheduler -> MICROSOFT -> WINDOWS -> WINDOWS UPDATE -> Disable All 

6.) Task scheduler -> MICROSOFT -> WINDOWS -> UPDATE ORCHESTRATOR -> DISABLE ALL UPDATES

7.) Task scheduler -> MICROSOFT -> WINDOWS -> UPDATE ASSISTANT -> DISABLE ALL

8.) Uninstall Windows 10 Update Assistant

9.) Delete Windows 10 Upgrade from disk (C:/WindowsUpgrade) or (C:/windows/WindowsUpgrade)

Please help!