Microsoft officially stopped supporting Windows 8 as of yesterday, the 12th January 2016. If you want to continue receiving support ( security updates etc) then one needs to either update to Windows 8.1 (free by the way) or downgrade to Windows 7.
Support for Windows 8.1 ends in 2023 whilst Windows 7 is good until 2020. This screenshot shows the relative dates:
Support for Windows 8.1 ends in 2023 whilst Windows 7 is good until 2020. This screenshot shows the relative dates: