Windows 10: Windows still booting in Legacy BIOS mode instead of UEFI even when the disk is GPT.

Windows still booting in Legacy BIOS mode instead of UEFI even when the disk is GPT plus i have installed it while my bios was in ufei mode. I tried re-installing the windows but faced same problem. Didn't face the problem as soon as i finished installing windows , i updated it and restarted the computer but when i shut it down and opened the pc next day i started having the same problem.

:)

 

Windows still booting in Legacy (BIOS) mode instead of UEFI even when the disk is GPT

H Awii_,

I honestly do not know how your system is booting in Legacy BIOS with a GPT format drive, that should not be possible. I honestly think to solve this you would need to backup your data then clean install Windows in UEFI Mode.

 

Windows still booting in Legacy (BIOS) mode instead of UEFI even when the disk is GPT

So I decided to convert my main SSD to GPT mode as I wanted to use UEFI booting, and I did that with EaseUS partition master. Problem is, the disk is converted to GPT, but Windows still boots in Legacy mode. The reason why I can still boot Windows is because I'm using CSM. My Windows version is 22H2.





Any help would be appreciated.

 

UEFI vs Legacy boot mode

Switching to UEFI bios on GPU does not enable UEFI mode if motherboard is set CSM = On. Setting CSM = Off in my experience causes Windows 7 issues, even if installed as UEFI mode with GPT partition on storage device.