New Build Insall Windows 10 Legacy, reinstall UEFI?

[ianmc000]

Just finished my new build, and everything works GREAT...However I accidentally installed Windows 10 in Legacy, and would like it installed UEFI. So here's my question. I'm waiting on a new monitor and have not installed all drivers yet...

https://www.newegg.com/Product/Product.aspx?Item=9SIA4P081H5569&Description=msi%2027%20inch&cm_re=msi_27_inch-_-24-475-009-_-Product

Should I wait for the monitor before I reinstall Windows 10 since it automatically detects hardware (drivers too), or just go ahead and reinstall Windows 10 UEFI and drivers?

Ryzen-7 2700x, Fatal1ty X470 Gaming K4, 2x8gb GSkill RipJaws DDR4 3200, PowerColor Red Devil RX580, Samsung evo 970 m.2.

Lastly I don't mind reinstall on Windows 10 since I really haven't done much and I am 'learning' how to navigate it. Monitor wont be here until next week.

Thank you in advance.

 

[bicycle_repair_man]

It's possible to "convert" the existing Windows installation to UEFI via the registry; I did it not too long ago. Obviously, you need to set the SATA mode to UEFI within the BIOS as well.

 

[SkyNetRising]

Not via registry. It can not be done via registry. This obviously is BS.

You have to use mbr2gpt utility. It will convert drive partitioning scheme from MBR to GPT and will create appropriate UEFI bootloader. After that boot mode in BIOS must be set to UEFI.

 

[ianmc000]

It's possible to "convert" the existing Windows installation to UEFI via the registry; I did it not too long ago. Obviously, you need to set the SATA mode to UEFI within the BIOS as well.

I have heard of this but like I said its not a big deal for re-install...besides I'm not sure how much I trust myself to go through the registry and start changing things lol. If its in the registry. Mostly I'm looking to see if there is any difference in installing my system with/without monitor. My current monitor is 6yo, not sure if this will autoset/autodetect anything in Windows or my drivers.

 

[SkyNetRising]

Ignore comment about registry modifications.
@bicycle_repair_man has confused change from legacy to UEFI with change from IDE to AHCI.
Those are completely different situations.

 

[bicycle_repair_man]

@bicycle_repair_man has confused change from legacy to UEFI with change from IDE to AHCI.

Ah, yes, now that I think about it, you're quite right.

Thanks for calling my comment BS by the way; very gracious of you. Perhaps try some manners next time?

 

[SkyNetRising]

Sure. You're welcome.

 

[scout_03]

https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/boot-to-uefi-mode-or-legacy-bios-mode