Download it as above and stick it on a USB stick. Restart your laptop holding down F2 as it boots. Then it's somewhere in the menu where you can browse the usb stick and find your download.
@Shinxchan , you just have to unscrew the back cover, but then you do that to snap off a number of tiny plastic rivets to remove the metal covers. Easy to do, but they wont go back on, without a few dabs of glue.
My laptop continues to be faultless since the update, with no hacks needed. Farcry5 running around 60/70fps in ultra on Performance in Armoury Crate, (seems a little quieter than Turbo, which overclocks a little)