I don’t use windows so I don’t know the specifics. If microsoft is INFORMING the user beforehand about this change (that copilot switch/policy is now available) AND DISCLOSE that in the future if you didn’t touch this switch then copilot may be installed, sure, blame admin. Otherwise, this is a shitty move from software update POV
To add: Maybe you can link the change log provided by microsoft before this update that adds those switches or rules to prove that it has indeed been disclosed to the admin.