Microsoft last week announced that within the next 18 months, it will end support for Windows 7 and Windows 8.1 on machines equipped with Intel's 6th generation Core processors, also known as "Skylake." As of mid-July next year, Windows 10 will be the only supported Windows platform on Skylake systems, and only the most critical security fixes will be released for earlier versions of Windows -- and then only if the fixes don't cause compatibility problems for non-Skylake systems running Windows 7 and 8.1.