boot – Windows 8.1 recovery USB drive not booting at all

I burned a Windows 8.1 iso to an 8GB USB drive but when I try to boot it from the BIOS I just get a blue screen error:

Recovery

Your PC needs to be repaired

The application or operating system couldn't be loaded because a required file is missing or
contains errors.

File: windowssystem32bootwinload.efi
Error code: 0xc0000001

You'll need to use the recovery tools on your installation media. If you don't have any installation
media (like a disc or USB device), contact your system administrator or PC manufacturer.

Press Enter to try again
Press F8 for Startup Settings
Press Esc for UEFI Firmware Settings

The error in question

I can’t get past there. I can’t acces the recovery options, I can’t even access the install screen since after seeing the Lenovo logo all I see is this instant BSOD. Pressing F8 does absolutely nothing, and I already checked the settings and it’s, indeed, set to UEFI.

Really what I’m trying to do is downgrade from Windows 10 to Windows 8.1. I have no idea why this file is supposedly corrupt since I downloaded the ISO from the official Microsoft website and used the rufus tool to copy it into the USB drive.
Yes, my computer is UEFI based. I checked and did everything correctly. When I used the tool it was set to UEFI. I also disabled the BIOS safe mode (or whatever it’s called, I can’t remember right now).

I downloaded the ISO twice and did the process with rufus twice, both unsuccesfull just ending up with the same blue screen error. After rebooting countless times I don’t really know what to do anymore.

I have a Lenovo ideapad s145 if this helps. I really would appreciate some help.