Microsoft is cracking down on Windows 11 bloatware ads, forces LG to pull McAfee popup
(www.windowslatest.com)
This should not be the fix, but noting here for posterity that this can be disabled in the Group policy Editor:
To stop Windows from auto-installing it again, or to block similar apps from other brands, open Group Policy Editor with gpedit.msc, then go to Computer Configuration, Administrative Templates, System, Device Installation. Enable “Prevent automatic download of applications associated with device metadata,” and click Apply.