Event details
The March 2026 Updates also need to be applied to the VM, not just the host.
As by Arden_White:
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The March updates need to be applied to both the host and the guest.
- Host changes are to allow KEK updates to the NVRAM
- Guest changes are to include a Hyper-V PK signed KEK that the guest can apply to the firmware
f I'm remembering correctly, if you look at the SYSTEM log at the TPM-WMI source, you'll see a 1795 event if the host is not updated and the guest is. Otherwise, you'll see an 1803 event if the host is updated and the guest is not.
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BTW: Your 1795 error message should have changed from "media is write protected" to "access denied" after you've installed the March 2026 Host Update - right?
Thanks Tobias for your answer. I had asked the question twice (also on this week's video) and got an answer on the other one, but forgot to update this one.
After installing updates on the VM, it went through flawlessly.
And yes, you are right, the error message changed as described.