To determine whether your target computer is using UEFI or BIOS on Windows 10, follow these steps:

• Open System Information:

Press Windows + R keys to open the Run dialog.

Type msinfo32.exe and press Enter to open the System Information window.

Check the BIOS Mode:

In the right pane of System Summary, look for the BIOS MODE line.

If the value of BIOS MODE is UEFI, then your Windows is booted in UEFI BIOS mode.

So select GPT in partition scheme in "RUFUS"

If the value of BIOS MODE is LEGACY, then your Windows is booted in MBR mode.

So select MBR in partition scheme in "RUFUS"