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Are these work computers not part of a domain ? Because if they are, your Admins should be disabling the upgrade via computer/group policy.

I'm all but sure the Win10 upgrade is a willing/opt in thing - not a forced update. The reason I say that is they have an expiration date for the free update. They aren't forcing you to upgrade, because once the free update is gone, they will be charging for it. And Windows 7's end of life probably isn't too far behind the end of the free upgrade.

My suspicion would be someone using the laptop hit the accept button on the Windows10 install pop up at one point trying to close it out.