Microsoft has a patch for "Meltdown-Spectre" vulnerability but , don't rush and end up with BSOD. You need to update your AV

Test/Update (all) your systems.


By now Windows users should have received the patches Microsoft released yesterday to plug the widespread Meltdown bug and its companion Spectre, which expose most computers and phones to speculative execution side-channel attacks that affect chips from Intel, AMD, and Arm.

But if you're a Windows user and haven't received Microsoft's patches yet, Microsoft warns that the reason is your antivirus isn't compatible with its Windows update.


For More:
http://www.zdnet.com/article/windows-meltdown-spectre-patches-if-you-havent-got-them-blame-your-antivirus/