Dear loyall
Thank you for posting in the Microsoft community.
You may refer to the following scenarios that
Solution to disable Windows updates
Press WIN+R and type
reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU" /v NoAutoUpdate /t REG_DWORD /d 1 /f
it will deploy a group policy for you to disable WINDOWS updates.
Disclaimer: Modifying the registry or workgroups is usually geared towards advanced users, administrators, and IT professionals, and it can help fix some problems, however, improper registry modifications can cause serious problems. Therefore, please make sure to strictly follow the steps below. For further protection, make a backup of the registry before modifying it. For more information on how to backup and restore the registry ref:How to back up and restore the registry in Windows - Microsoft Support
It will help you to define Windows Update as the Windows Update that will be downloaded only after you click on Check for Updates.
This way Windows Update will not bother you anymore.
Hope this will fulfill your needs.
Best Wish
Shawn.Z-MSFT | Microsoft Community Support Specialist