Can't get new build PC to install Windows 10 from USB: "Reboot and select proper boot device" error

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TheMightyO

Commendable
Mar 7, 2016
4
0
1,510
Hi all!

I've searched high and low on Google for the past three hours and can't find an answer that will help.
Built my first ever PC (been a Mac user all my life) and it boots up fine into the Bios. However, whenever I try to boot into my Windows 10 boot disk (USB) I'm given the error:

"Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key."

My PC is running an i7-6700k CPU on a Gigabyte GA-Z170N-Gaming 5 (Mini ITX) mbo with 16GB ram and an MSI Geforce GTX 970 video card. There's a 240GB Sandisk SSD Plus (which shows up in the bios) and a separate WD 1TB HDD (which I have left disconnected for now because I didn't want anything to accidentally install on it).

I've tried two different USB drives (both Kingston) in various ports on the PC (they're all 3.0) but no matter what I do I get that same error message. The .iso was downloaded directly from Microsoft and turned into a bootable USB using this method on a MacBook: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-mac-osx
(I was going to try and make a bootable USB via BootCamp but most people don't recommend that and the method above seems to be the cleanest way).

If anyone can help, it'd be much appreciated!
Thanks :pt1cable:
 
Solution
Shaun o
Two things,

On some motherboards the usb port used for boot able usb or flash drives can be a set one.
Check the motherboard manual for what usb port you may have to plug the usb flash drive to, for booting.

In your bios if you look there will be an option to enable detection of usb legacy devices.
Make sure this is enabled.

Make sure in the bios, and the boot order of devices the usb drive is set to your first boot able device.
Make sure you are in advanced mode of your uefi capable bios.

Look for the option of device detection.
There will be a setting of Legacy Uefi booting.

Make sure the mode is selected to Legacy and Uefi joint mode detection.
It can be found in the bios under compatibility and support mode.
CSM for short...
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Shaun o

Shaun o

Illustrious
Oct 7, 2007
6,113
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41,960
Two things,

On some motherboards the usb port used for boot able usb or flash drives can be a set one.
Check the motherboard manual for what usb port you may have to plug the usb flash drive to, for booting.

In your bios if you look there will be an option to enable detection of usb legacy devices.
Make sure this is enabled.

Make sure in the bios, and the boot order of devices the usb drive is set to your first boot able device.
Make sure you are in advanced mode of your uefi capable bios.

Look for the option of device detection.
There will be a setting of Legacy Uefi booting.

Make sure the mode is selected to Legacy and Uefi joint mode detection.
It can be found in the bios under compatibility and support mode.
CSM for short.

On some motherboards you can limit the amount of usb ports that are active, or disabled from power up check all usb ports are enabled in the bios settings menu pages.

Do not connect the flash drive to a usb 3.0 enabled port, you must use a usb 2.0 spec port to enable detection of a usb boot able device in some cases, and it can be a designated usb port set in the bios, as stated in the post above this.

Why is because the board may require a usb 3.0 driver to be running first, that you don`t have since your installing windows for the first time.


Save the bios changes made before you exit the bios.
Providing you have created the boot able usb flash drive properly.
It should then detect the usb flash drive and begin to boot from it and setup/ install windows 10.
 
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Solution
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TheMightyO

Commendable
Mar 7, 2016
4
0
1,510




Unfortunately I've made no progress still. Here's a picture of my bios screen:
IMG_4388.jpg


I've tried booting up with the USB as priority, the SSD as priority, with the "Storage Boot Option Control" set to UEFI and also Legacy (it won't let me choose both, only one or the other), same goes for "Other PCI Device Rom Priority".

Not sure what else I can try? Would it help to show my other Bios screens? Feel so useless at this point!
 
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T

TheMightyO

Commendable
Mar 7, 2016
4
0
1,510
Thanks for your help.
Just to update that the culprit was my Mac. Despite creating multiple Windows 10 USB boot .iso's using numerous different methods on my MacBook, it clearly does something to the USB that makes it unreadable for PCs.
Created a new USB boot image on an old PC my parents had at home and everything loaded up fine.

Conclusion: Never create an installation disk on a Mac.
 
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