The data analysts firm NetMarketShare revealed that Windows 10 has seen another uptake in users and it went up to 64.04% from 61.26% last month. Linux (multiple distros) went from 1.14% to 1.65% and Ubuntu now holds a market share of 0.51%. Windows 7 users can upgrade to Windows 10 for free using the Media Creation Tool. Microsoft is not known how long Microsoft will allow this upgrade loophole to exist, so if you are running Windows 7, it is suggested you take advantage of it while you can.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-7-wont-die-still-second-most-popular-operating-system/