So at work, my PC is Win 7 running Kaspersky 10.2.1.23 (yeah, I know). According to the Kaspersky website, the required version for the reg key needed is 10.3.0.6294 (SP2).
Yet, I *do* have the reg key (I double checked). And I am being offered the 2018-01 Security Monthly Quality Rollup KB4056894. Now, I don't know *why* I am being offered it, since I thought that I needed to upgrade my AV version from 10.2 to 10.3, before I would get the prerequisite reg key. But it for sure looks like I am read for the OS patch patch of the Meltdown / Spectre fixes ... Their document 14042 says that their database updates went out Dec 28 to enable the flag. Apparently this applied even to my version ... Haven't checked yet for the firmware patch for my Optiplex 9020, but I imagine that will be there, or there soon ... So that may make patching my workstations a lil easier. Not sure yet about all my servers ...