I had contacted support and they chatted that I could use the z640 update for the z620 when I was concerned I could not find one for the z620. I don't recall it ever succeeding, but after a few re-installs of w10pro, I let w10 do the magic and I was prompted at boot to F1 enable tpm and later f3 to clear, and w10 booted up still My question is if I can or how to get to 2.0 from 1.2 currently working?
tpm.msc reports: Manufacturer IFX, Manufacturer Version 3.19, Specification Version 1.2
if v=3.19, I have seen lots of higher version upgrades of 1.2 to 2.0, but none as low as 3.19; BIOS is 3.94..