Has anyone come up with a successful task to remove KB5066835 and/or KB5065789? When using wusa.exe it requires the /quiet flag otherwise it will popup a dialog asking if you really want to remove the KB. The user will never see the dialog since the job runs at a system context and it can’t be used from the logged in user context as they would need to have admin, which most users don’t. That would be fine except using the /quiet flag generates a syntax error per event viewer even though /quiet is a documented flag for running wusa.exe.
Did you try running the Microsoft Rollback Wizard to remove this KB? I haven’t used it myself, but it’s generally intended for uninstalling KBs.
If it’s missing the /quiet flag, you can create a custom copy and add the flag in the action script.
What exact command lines are your running?
To test, from an interactive command prompt I’d expect
wusa.exe /uninstall /kb:5066835 /quiet
wusa.exe /uninstall /kb:5065789 /quiet
From a BigFix action you also need to consider 32-bit redirection so an actionscript might be
action uses wow64 redirection false
waithidden wusa.exe /uninstall /kb:5066835 /quiet
waithidden wusa.exe /uninstall /kb:5065789 /quiet
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