After four months in the wild, it's safe to say that Windows 10 is a solid operating system that works well for most people. However, for some people upgrades haven't gone as well as they should have, and some have decided to go back to an earlier operating system.
Other users aren't even considering an upgrade due to Windows 10's privacy-invading features and Microsoft's general pushiness in trying to get people to upgrade. So, it's a relief that users still have the option to buy computers running Windows 7 and 8. However, if you're in that boat, you should know it isn't going to continue forever.
Microsoft has a long-standing rule about how long computer manufacturers can use previous versions of Windows. Manufacturers have to stop loading old versions of Windows onto new computers two years after the release of the latest Windows version.
Windows 7 Home Basic, Home Premium and Ultimate actually stopped shipping on computers on October 31, 2014, which was two years after the launch of Windows 8. However, Microsoft extended the life of Window 7 Pro another two years because of the backlash against Windows 8.