Does UEFI need to be enabled to install Windows 10 Feature Updates?

My9to5 261 Reputation points

We are using a task sequence found online that does a preliminary check to see if UEFI is turned on. We tested on machines with Legacy and it seems to be working ok.

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  1. Gary Blok 1,716 Reputation points

    You can upgrade Windows 10 machines to new versions of Windows 10 even if the BIOS is set to Legacy instead of UEFI. (AKA, 1909 -> 20H2)

    You're going to miss out on all the security enhancements that require UEFI + Secure Boot, and you won't be able to upgrade to Windows 11.

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  1. Amandayou-MSFT 10,951 Reputation points

    Hi @My9to5 ,

    As far as I know, UEFI need not to be enabled to install Windows 10 Feature Updates.

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  2. Jason Sandys 30,911 Reputation points Microsoft Employee

    Plus one to @Gary Blok 's answer. You can, but just because you can, doesn't mean you should. This is a bad idea in general. You should 100% be enabling UEFI and Secure Boot on your devices.