Downgrade to 8.1 using MS system restore USB

[kenjancef]

So I'm having some issues with Windows 10 on my SP3 (surprised, right?), and I want to go back to 8.1 so I can re-do the Windows 10 install. I downloaded the SP3 recovery image direct from Microsoft, and put it on a USB as directed. But when I boot using the Volume Down-Power Button boot, and go into the Recovery options, all I can do is restore Windows 10. I don't see any way to go back to Windows 8.1. I've even set my BIOS to boot from USB, but I just get back into the same loop... I can't seem to get my system back to Windows 8.1.

Is there something I'm missing????

 

[homeedition88]

It sounds like your USB drive isn't bootable. If you have any other USB drive try to use it and when you will format it choose fat32 file format.