For the sake of PC
Windows 7 official support ended on the January 14 and Microsoft is urging all users to upgrade to Windows 10.
Windows 8.1 too
Windows 10 now has 120 million activations thanks mostly to the fact that Microsoft is offering for free to Windows 7, 8 and 8.1 users. Now Redmond has told its OEM chums they need to prepare to stop selling Windows 7 Professional from October 31 2016.