Will steam try to 'claim' a game I didnt originally purchase via Steam? [closed]

Solution 1:

Steam doesn't claim anything untill you activate the product via steam. However, the Elder Scrolls Online that was bought outside of steam CANNOT be activated on steam. I had bought ESO outside of steam (I was told I could activate it, but I couldn't), and had it installed twice at a certain moment because I got a steam key as well later.