I tried a search and couldn't find a similar case.
Running WinBatch on Windows Server 2019, anytime Windows updates are avaialble, a small notification in the bottom right pops up.
I had tried disabling this but appeared to be unsuccessful.
Has anyone been able to work around this?
Not sure about your OS, but for Windows 10:
https://winaero.com/disable-updates-available-windows-10/#:~:text=Disable%20Updates%20Are%20Available%20Popup%20In%20Windows%2010.,repeat%20the%20same%20for%20the%20MusNotificationUx%20file.%20
Assuming that proper backup procedures are in place and for critical systems, a fallback VM has been created or is available, one could simply install the updates.