A similar question is what happens if you get up to go to the bathroom, some software on your machine updates and requires you to accept the new ToS, and your cat jumps up on the keyboard and selects "accept". Are you still bound by those terms? Of course. If licenses are valid in any way (the argument is they get you out of the copyright infringement caused by copying the software from disk to memory) then it's your job to go find the license to software you use and make sure you agree to it; the little popup is just a nice way to make your aware of the terms.
Actually, no, because you didn't intentionally accept the terms, and you had no reason to expect that your cat would jump on there in exactly that way.
On the other hand, if you take a laser and intentionally induce the cat to push the key, then you are bound.
> If licenses are valid in any way (the argument is they get you out of the copyright infringement caused by copying the software from disk to memory) then it's your job to go find the license to software you use and make sure you agree to it; the little popup is just a nice way to make your aware of the terms.
The way you set up the scenario, the user has no reason to even know that they're using this new version with this new license. An update has happened without their knowledge. So far as they know, they're running the old software under the old license.
You could make an equally good argument that whoever wrote the software installed software on the user's computer without the user's permission. If it's the user's fault that a cat might jump on the keyboard, why isn't it equally the software provider's fault?
... but the reality is that, taking your description at face value, nobody has done anything. The user had no expectation or intention of installing the software or accepting the new license, and the software provider had no expectation or intention of installing it without user permission, and they were both actually fairly reasonable in their expectations. Unfortunately shit happens.
> the argument is they get you out of the copyright infringement caused by copying the software from disk to memory
This is not copyright infringement in the USA:
> …it is not an infringement for the owner of a copy of a computer program to make or authorize the making of another copy or adaptation of that computer program provided… that such a new copy or adaptation is created as an essential step in the utilization of the computer program in conjunction with a machine and that it is used in no other manner
— https://www.law.cornell.edu/uscode/text/17/117