Error: This tool can only be run on systems booted using PC/AT BIOS.

[SpecialOne]

I followed this tutorial https://www.youtube.com/watch?v=nZVgInbhTAw to make my bootable Windows 7 USB.

I am getting this error: This tool can only be run on systems booted using PC/AT BIOS. This system was booted using EFI or some other firmware type.

Maybe this is my main problem my USB can not boot on my new Lenovo? I created thread here.

What I should do?

 

[Ztruker]

Follow these directions: How to Create a Bootable Windows 7 Installation USB Flash Drive

I prefer Option Two, using Rufus.

Do you have a Windows 7 ISO or are you starting with a Windows 7 DVD? If DVD then use ImgBurn to create a ISO file from the DVD then follow Option Two.

 

[SpecialOne]

Follow these directions: How to Create a Bootable Windows 7 Installation USB Flash Drive

I prefer Option Two, using Rufus.

Do you have a Windows 7 ISO or are you starting with a Windows 7 DVD? If DVD then use ImgBurn to create a ISO file from the DVD then follow Option Two.

I downloaded official ISO image from the Internet. I found on this forum website. Will try to create UEFI bootable with Rufus. Prior I used default option with Rufus and I couldn't install. Also used different methods like UltraIso, Microsoft USB tool which had problem to finish process until the end etc.

 

[SpecialOne]

I used Rufus and this time I selected "GPT partition scheme for UEFI", but still same problem. I changed in BIOS options to boot from UEFI and got this weird error: "EFI USB device has been blocked by the current security policy".

 

[SpecialOne]

I was able to install Windows 7. Check here for more info.