http://www.techradar.com/news/microsoft-releases-emergency-update-to-disable-intels-faulty-spectre-patch

News about the Meltdown and Spectre processor seems to be going from bad to worse, and over the weekend Microsoft had to release an emergency patch to disable patches for the Spectre bug.

The Windows Update (KB4078130) in question is something of a rarity, as not only did Microsoft rush it out over the weekend (rather than waiting until Tuesday, the usual day Microsoft releases updates), but it directly disables a security patch released by Intel.