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waltforbesFlag for Bahamas

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How To Upgrade the BIOS of a VMware Virtual Machine?

Points of My Scenario
1. I am admin for our VMware infrastructure: vCenter Server 5.5 on ESXi 5.5 cluster
2. Microsoft has asked me to update the BIOS for one of the Windows VMs - not the ESXi host
3. I upgraded the hardware version of the VM (from version 8 to version 9)
4. This hardware version upgrade did not change the BIOS version of the VM (Note: I used Windows' built-in msinfo32 to get BIOS version).
5. Info: The VM's "BIOS version/Date" - as reported by msinfo32.exe - is "Phoenix Technologies LTD 6.00 9/17/2015"

QUESTION: How do I upgrade the BIOS of a Windows VM (Server 2012 R2) hosted by an ESXi 5.5 server?
ASKER CERTIFIED SOLUTION
Avatar of Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
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ASKER

Many thanks....This is excellent information, Andrew!

Microsoft believes that regular OS crashes on the VM are due to either the VM's BIOS or VMware drivers needing upgrade.
We already upgraded the VMware Tools to handle the drivers issue. But it was to no avail.

I'll wait to hear from you about 6.7u3.
I can appreciate Microsoft's position, you are very out of date, in terms of host and ESXi 6.0 goes out of support this year in March, so that will just leave 6.5 and 6.7 in support.

Until the next version......(very soon!)
Oh man! Many thanks for all the insights, Andrew. I shall now close this case.
This is exactly what I need to know!
No problems. You could build an ESXi 6.7 server for FREE, to prove a point to Microsoft..... if it still crashes its not the BIOS!