No bootable device Found

[LittleSilly]

I bought a brand new 120gb Kingston SSD and want to install Windows 8.1 64-bit from a bootable USB and it doesn't show up in boot manager. I used both the windows installation media and rufus to make a bootable usb and it doesn't work, I also tried  disabling both legacy and secure boot (a solution I found when installing win 10 on another hdd using a cd) it still doesn't work. Any more help?

[WAWood]

@LittleSilly 

When you press F9 to get the Boot Devices menu, does the USB stick still now show up?

Then, you need to go back into the BIOS/UEFI settings and look for one named Disable booting from portable devices -- as that will also prevent the USB stick from showing up.

[LittleSilly]

The USB stick still doesn't show up even if I try different usb ports.

And also there is no "Disable booting from portable devices" option in my bios boot options.

Should I try updating the bios?

[WAWood]

@LittleSilly 

I would not as updating the BIOS always runs the risk of trashing the PC.

[LittleSilly]

My current bios version is F.22 and in the Software and Driver Downloads page the latest bios update is F.27 Rev.A for win8 64-bit.

[WAWood]

@LittleSilly 

I always advise against BIOS updates because they can trash your PC.

If you do this one, then be sure to exercise the option to backup the current BIOS to a USB stick before doing the update.  That at least gives you a chance of recovery if the BIOS update goes badly.

[LittleSilly]

How can I backup my current bios? I'll put updating the bios as a last resort if I can't find any solution to my problem.