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Tip from Engineering - Use UEFI firmware for Windows 10 & Server 2016

10.20.2017 by William Lam // 14 Comments

Several weeks back I was chatting with a few of our Engineers from the Core Platform Team (vSphere) and they had shared an interesting tidbit which I thought I was worth mentioning to my readers. When creating a Virtual Machine in either vSphere or Fusion/Workstation, customers have the option to override the default and specify the specific Firmware boot option whether that is BIOS or UEFI.


Like most customers, I do not even bother touching this setting and I just assume the system defaults are sufficient. Interestingly, for Microsoft Windows 10 and Windows Server 2016, there are some important implications to be aware of on whether BIOS or UEFI is used. This is especially important since the default firmware type in vSphere for these OSes are BIOS.

UPDATE (01/07/21) - As of vSphere 6.7 Update 3, the default firmware for creating a Windows 10 and Windows Server 2016 guest OS is now EFI

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Categories // Fusion, Security, vSphere 6.5, Workstation Tags // Credential Guard, Device Guard, fusion, Secure Boot, UEFI, vSphere 6.5, windows 10, windows 2016

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William Lam is a Senior Staff Solution Architect working in the VMware Cloud team within the Cloud Infrastructure Business Group (CIBG) at VMware. He focuses on Cloud Native technologies, Automation, Integration and Operation for the VMware Cloud based Software Defined Datacenters (SDDC)

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