Check DEFAULT SETTINGS.
Sounds like the reconfiguration is not being saved by the OS, and upon re-boot sees it as malicious.

Also....scan your system for viruses ..... a very necessary practice. After you know the system is "clean" go back to MS Update and re-install manually (not bundled with other updates).
Since this is not your system, most likely it has not been done regularly out of fear of messing things up......

Manually install software and apps .... allows you to "hard-wire" associations and override your system walls.