Question How to run Legacy USB in EUFI?

[kumitsu21]

Hi. I want to use MODS MATS to test my graphic card but the software can only be installed into USB via Rufus software using FreeDOS and MBR format. My PC only supports UEFI. Is there some solution for this?

 

[jojesa]

Check your BIOS settings for USB Legacy support.

 

[TerryLaze]

It could also be called csm.
Keep in mind that afterwards if you want to boot into your normal windows you will have to re create the uefi security keys.

 

[kumitsu21]

If this is the part of secure boot I have already disabled it.

 

[TerryLaze]

If this is the part of secure boot I have already disabled it.

So what exactly is the problem you are having?!
Does it reach dos prompt or does it just say no boot device?!
It could be that you have to run the command by hand.
It would help if you link the tutorial you followed, or just list the steps you did here.

 

[kumitsu21]

It does not detect bootable device. I did the following steps:

Format USB using Rufus software,:
Boot selection: FreeDOS
Partition Scheme: MBR
Target system: BIOS (or UEFI-CMS)

Then just copy files over. It works on legacy BIOS systems but not UEFI.
Tutorial: https://rk.edu.pl/en/nvidia-modular-diagnostic-software-mods/

I also tried Easy3boot software but it's quite complex and from what I seen it works with .IMG files at least I didn't manage to figure it out any other way.

 

[TerryLaze]

Yeah, if your PC can't boot into legacy at all then there is nothing you can do.
But if you can disable secure boot as you said then did you check in the boot options?! Usually they show two different options for usb one with uefi and one without.

 

[jojesa]

Could you post motherboard or system model.