I upgraded, but that's my line of work.. I usually get and test out the new stuff, like I'm testing rather evaluating Windows Server 2016. If you have a legit copy of Win7, by all means upgrade there's a lot more you can do with 10. As for playing your old games, ie you don't want to let go of CnC ZeroHour, then install virtual box, and run a VM of Win(?) whatever..that way you have your cake and eat it too
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