Windows 10 has only been on the market for a few weeks and so far, it seems popular. So popular in fact that reports are now coming out that the OS has exceeded 53 million installs. Both NeoWin and WinBeta have published unconfirmed reports that Windows 10 installs have passed 50 million installs. That takes up approximately 4.95% of the total PC OS market share. Those numbers are gathered via page views on websites so these numbers are not very accurate. That said, it does give us a fairly good idea of just how popular the OS is.
Microsoft has yet to confirm any reports on Windows 10 install numbers since the first week where they confirmed over 14 million installs within the first 24 hours.Source: Neowin