Solved!
I booted up in a BIOS/Legacy mode my USB drive, succesfully managed to enter the SSD drive.
Afterwards, i used bootrec /FixBoot to make sure it wasn't a software problem.
And finally, i disabled CSM Support on UEFI settings and set the W8/10 features to WHQL.
After updating my mobo to F14 and rebooting, an alert showed up on boot asking me to "Update Firmware", i accepted, but it downgraded me back to F11, and now the mobo won't boot ANY media, not even usb drives, when i try to boot it just shuts off, and reboots again. After rebooting, it gets...
Intel i7 8700K
The FW update originally was done by the system itself (it offered to update the FW, after I manually updated to F14, and it downgraded me to F11)
So I booted up my PC when I get an alert from the BIOS suggesting I updated the mobo's firmware. I accepted, after which I was downgraded back to F11 from F13. After this failed update, my computer can't go past the "Aorus" logo screen and the LEDs indicate "A2" before rebooting and doing it...