Immoral? No. Illegal? Yes.
You already bought the game, so I'm of the opinion that it's your right to secure a copy.
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ethics are a thing personal to each individual
Morals are personal, whereas ethics are a moral code that is agreed upon by a group of people. E.g., Religious ethics, humanitarian ethics, cannibal ethics, etc.
Well, in Canada what's illegal is the
unlicensed use of the software. Technically here you can download as much software as you want for archival purposes -as long as you don't use any of it. I don't know about the US, but I suspect that, even if someone tried to sue for it, it would not hold up in court. The plantiff would have to prove harm which is absent in this case.
Morally, if it's a game I own, I don't have an issue with it. I lost my Age of Empires II CD quite a while ago and downloaded the game. :shrug: CD Copy Protection makes it a pain in the ass to make a
legally entitled backup copy, so screw 'em.