Windows 7’s extended support ends on January 14, 2020. The operating system left mainstream support in 2014, meaning that for the last two years—and next three—it only receives security fixes. But Microsoft is telling corporate customers that even with those security updates, the 2009 operating system isn’t really cut out for the world of today. According to Redmond, enterprises should plan to move to Windows 10 sooner, rather than later.

The reason, according to Markus Nitschke, head of Windows at Microsoft Germany, is that Windows 7 “does not meet the requirements of modern systems, nor the security requirements of IT departments.”

There are two elements to this. Companies buying new hardware using Intel’s Skylake or Kaby Lake processors have little choice but to use Windows 10. Installation and driver support for Windows 7 and 8.1 is limited to certain systems since changes in the Skylake platform, such as the integrated USB 3 controllers and processor-controlled power management, aren’t supported in Windows 7. PC OEMs can still make the older operating system work, but it requires extra effort on their part. AMD’s new Ryzen processors and Windows machines built using the Qualcomm 835 processor will similarly need Windows 10.