All good things must come to an end, and the reign of Windows 7 as an actively supported, good-enough operating system is no exception. While it may feel like you just finished the heavy lifting of migrating your Windows XP machines to Windows 7, it turns out that Windows 7 is now more than nine years old, at least two and a half versions behind Windows 10 (depending on whether you consider Windows 8.1 to be a version of Windows all its own), and approaching end of Microsoft support in 2020.
Creating and managing deployment groups
Source: – computerworld
Windows 7 to Windows 10 migration guide