Which Win is better to give up your piece of iron?

7 of course. In 10, except for DH12, there is nothing, problems with firewood, built-in spyware and other slag.

Hostweex It depends on
what you need from Windows - if you play new games that only run on 10-ke, the choice is obvious. For everything else - 7-ku is also possible, while it is the most popular OS, most programs (and games) will work on it without problems. If it's not a secret, why does 8.1 "not seduce"?

Windows 10. Windows 7 is already time for the dustbin of history.

Customized

SonyK.
when setting up programs such as SQL servers and the like, various unpleasant problems surfaced that were not observed at 7, and there were jambs with old games from 90-2005

warp 37
And you follow her until you explain how "10" is better.