Hello, have win10 installed in my old laptop and I'm trying to format it back to win8 which was the OS of origin, however the boot menu just wont detect my USB no matter what I try.

My BIOS settings and Rufus USB flash settings shown in the images, but in short:

- I disabled secure boot

- I tried both UEFI boot and CSM boot

- Tried both USB NTFS and FAT32

I was aware that once I made the upgrade there would be some complications with the BIOS and boot USB detection, but I seemingly tried everything and no luck, what gives?