Asus Z270K cpu microcode

Is this microcode an update that is to be installed because of the Meltdown issue?
What are the actual steps to installing this type of file?
I found reference to the Al Suite tools so I installed this Suite but when I clicked on the upgrade checking the result was that no update was required at this time. This Desktop Bios was updated when the ME correction was done in the past months. I think the Bios is dated July 2017
Just a little confusion to add to the other question I have.
Does this microcode compliment the future Microsoft updates. Should it be in place or not before Microsoft produces stuff against the Meltdown insecurity?
I'm leaning towards the plan of having a technician in town install this thing.

Search Asus website for firmware update

This is the cpu microcode that is on the bios & firmware downloads. I have downloaded this and its a cap type file.
I was looking for descriptions that outlined how a cap file is installed.

The Windows patch only solves part of the problem you need to install the updated Bios which contains the Microcode.

If the Motherboard is a PRIME Z270-K you go here PRIME Z270-K BIOS & FIRMWARE| Motherboards | ASUS USA
and downloaded it.
AI suite can't find it as it's only just been released, you will have to manually download it, extract the cap file and personally I'd put it on a USB stick and use EZ Flash in the bios to update it. To access the bios press Delete on starting the PC up.
Your Bios should have EZ Flash, a how to here ASUS EZ Flash 3 introduction | Official Support | ASUS UK

If that's too complicated you may be better getting someone used to flashing a Bios to do it.

That's the upgrade to address the recent Spectre vulnerability. You need to use the proprietary flash tool if you want to update the BIOS. I'm not familiar with ASUS, but with MSI all of this is included in the download, aswell as a read-me on how to do it properly, ASUS should have similar download path. Usually the steps are simple: You download all the files to a bootable USB device, and you launch it at startup. Also on modern hardware there's usually a built-in flash tool in the BIOS screen to make it easier. And whatever you do, never update the BIOS through the Windows desktop, always do it through the BIOS. This is the safest option.

Asus just has a zip file containing the bios cap file, no instructions or tool, that's in the bios or alternatively the Asus AI Suite which I would avoid using, as it's done from Windows which as said is not the safest place to Flash a Bios from. Incidentally I've never yet had the EZ Flash in the bios or AI Suite find the latest Bios version on line.

Asus doesn't require a bootable drive for a Bios Flash just needs the cap file putting on a drive, USB or internal, you browse to it from the EZ Flash utillity in the Bios