Found this on one machine. Key expires in 5 days. System runs Linux only and has never booted Windows, ever. Secure boot may be off.

    SHA1 Fingerprint: 46:de:f6:3b:5c:e6:1c:f8:ba:0d:e2:e6:63:9c:10:19:d0:ed:14:f3
    Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            61:08:d3:c4:00:00:00:00:00:04
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Corporation Third Party Marketplace Root
        Validity
            Not Before: Jun 27 21:22:45 2011 GMT
            Not After : Jun 27 21:32:45 2026 GMT
        Subject: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Corporation UEFI CA 2011

▲ Bender 10 hours ago | parent [-]

I had to vouch your comment, not sure what happened there. Something in your technical output must have triggered HN. One can use mokutil to see if Secure Boot is enabled after installing it. I assume the OEM installation or update of the BIOS must have included that cert but I am just guessing.

    mokutil --sb-state

▲

Animats 10 hours ago | parent [-]

Thanks.

Just checked. Secure Boot is not enabled on any of my machines, which are Linux-only. Whew!

(I wonder if any of the ASUS subnotebooks I bought off eBay for minor embedded stuff have this problem. Have to power them up.)

	▲	Bender 10 hours ago \| parent [-]
		My ASUS laptop had it enabled. I had to disable it as there just wasn't enough non volital memory to hold all the updates even after remove several EFI entries and resetting the BIOS. All my mini-PC's updated fine however. My Linux Protectli routers already had it disabled thankfully. They use Coreboot, unsure if that was a factor.