Meltdown and Spectre Windows KB numbers
KB4056890 Windows 10 v1607, Server 2016, Windows 10 Mobile KB4056891 Windows 10 Mobile 15063.850 KB4056892 Windows 10 v 1709 KB4056893 Windows 10 Enterprise KB4056894 Monthly Rollup Windows 7 SP1, Server 2008 R2 SP1 KB4056895 Monthly Rollup Windows 8.1, Server 2012 R2 Standard KB4056896 Monthly Rollup Server 2012 Standard KB4056897 Security Only Windows 7 SP1, Server 2008 R2 SP1 KB4056898 Security Only Windows 8.1, Server 2012 R2 Standard KB4056899 Security Only Server 2012 Standard