How to bring windows 10 in windows 7 and 8? There are plenty of reasons to embrace Windows 10, not least the fact it it is a free upgrade to users of Windows 7 and 8.1. Going by numbers alone, Windows 7 remains the most popular Windows operating system (OS). Despite what the folks at Apple say, it’s fast, stable and accounts for almost half of the worldwide PC usage. There’s no reason to upgrade to Windows 10 unless you want to.