Win10 UEFI: BIOS needs to be reinformed that Windows is set to boot UEFI style

[mikeymikec]

I've done this once before and it was either with bcdedit / bootrec or with diskpart. I would rather not have to do all the googling I did before to find this again, so if someone knows how to do this, please let me know

 

[Ketchup]

Something like this?
https://neosmart.net/wiki/enable-uefi-boot/

 

[mikeymikec]

It was related to this thread:

https://forums.anandtech.com/threads/stability-issue-im-having-difficulty-with.2495916/

The BIOS had forgotten its UEFI platform secure boot keys, that's what I was trying to reinstate. The BIOS has an option to recreate the default keys (whether those are enough to boot a UEFI Windows install, I have no idea). It didn't resolve the problem but I think the installation had more issues than just that.

 

[RLGL]

The boot mbr is written over when changing modes

 

[mikeymikec]

The boot mbr is written over when changing modes

Citation needed. I can't imagine any manufacturer making a BIOS setting that results in writing to a storage device because of the increased potential for wrecking things (possibly just beyond the average user's knowledge to reinstate the correct setting, or worse).

Also, wouldn't there be a difference in how MBRs are written on GPT partition layouts compared to legacy ones?

 

[pcgeek11]

Citation needed. I can't imagine any manufacturer making a BIOS setting that results in writing to a storage device because of the increased potential for wrecking things (possibly just beyond the average user's knowledge to reinstate the correct setting, or worse).

Also, wouldn't there be a difference in how MBRs are written on GPT partition layouts compared to legacy ones?

GPT doesn't use an MBR.

Read this:

http://www.howtogeek.com/193669/whats-the-difference-between-gpt-and-mbr-when-partitioning-a-drive/