https://www.theregister.co.uk/2018/01/04/microsoft_windows_patch_meltdown/

Microsoft has released updates for Windows to block attempts by hackers and malware to exploit the Meltdown vulnerability in Intel x86-64 processors – but you will want to check your antivirus software before applying the fixes.

The Redmond giant issued the out-of-band update late yesterday for Windows 10 version 1709.