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Can't Boot Win by USB

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powell1 View Drop Down
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    Posted: 01 Sep 2016 at 11:31pm
Hello, I have a problem with my Asrok B85M Pro4 mainboard. I can't boot from a USB 2.0 Win 8-64BIT.

I use "Rufus" to make a bootable USB Device and use settings for UEFI BOOT.

I have access to the UEFi (BIOS) and can change things. (UEFI works and is up to date 2.5)
I tried different settings (MBR and MBR and GPT-RUFUS) for boot but it will not work.
I use the integrated graphics from the CPU which allow me to use UEFI. WHen i use the graphic card  i have to use CSM / VIdeo legacy BIOS.(AMD 6900 HD Series (Does not support UEFI)

The problem is always when i make a bootable usb-Device (Win 8 64-Bit) and i choose it from the Bootmenue (UEFI USB .....) then the Windows Logo appears and nothing else happened.

should i buy a new motherboard or what is that ?!
Normaly when we stick a usb stick which is bootable it should work (and worked ) but not with this motherboard.

My System:

Intel Pentium F3260
Different SATA HDDs
internal graphic unit (CPU)
benq VGA TFT
Kingston 8GB RAM
B85M Pro 4 Motherboard



Edited by powell1 - 01 Sep 2016 at 11:33pm
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clubfoot View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote clubfoot Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2016 at 1:42am
Are you using the rear I/O panel usb,..not a hub or front panel!

>>then the Windows Logo appears and nothing else happened.
Sometimes you may have to wait a bit for the installation menu to appear.
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powell1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote powell1 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2016 at 2:14am
I used always the rear Panel  and tried USB 3.0 HUB and 2.0 but it didn't work.
Sometimes there is a meassage like: "...proper Device" or the Logo just appears and stands their until it rebot from self or i shut it down.
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parsec View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote parsec Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2016 at 10:29am
Originally posted by powell1 powell1 wrote:

Hello, I have a problem with my Asrok B85M Pro4 mainboard. I can't boot from a USB 2.0 Win 8-64BIT.

I use "Rufus" to make a bootable USB Device and use settings for UEFI BOOT.

I have access to the UEFi (BIOS) and can change things. (UEFI works and is up to date 2.5)
I tried different settings (MBR and MBR and GPT-RUFUS) for boot but it will not work.
I use the integrated graphics from the CPU which allow me to use UEFI. WHen i use the graphic card  i have to use CSM / VIdeo legacy BIOS.(AMD 6900 HD Series (Does not support UEFI)

The problem is always when i make a bootable usb-Device (Win 8 64-Bit) and i choose it from the Bootmenue (UEFI USB .....) then the Windows Logo appears and nothing else happened.

should i buy a new motherboard or what is that ?!
Normaly when we stick a usb stick which is bootable it should work (and worked ) but not with this motherboard.

My System:

Intel Pentium F3260
Different SATA HDDs
internal graphic unit (CPU)
benq VGA TFT
Kingston 8GB RAM
B85M Pro 4 Motherboard



So you've done UEFI booting Windows installations in the past? If so, you should have no problem.

What settings do you use for UEFI booting in your board's UEFI?

Your board is not the problem. I have been doing UEFI booting Windows installations since the ASRock Z77 boards were released, before your board existed.

Are you sure your memory, etc, is compatible with this board? Have you ever used it before?

You said you've used the Intel graphics, and that worked for a UEFI booting Windows 8  installation? But it doesn't work with the video card?

What are you using as the OS drive? You must only have the target OS drive connected to the board, and have the SATA mode set to AHCI or RAID.

I hope you mean you have a G3260 CPU. You need at least UEFI version 1.20 for your CPU.

You MUST use a USB 2.0 port on the board's IO panel. If the USB flash drive is larger than 16GB, that can cause problems.

Use the default Rufus settings if you must use Rufus. Here's a link to a guide that shows how to use Rufus for your purpose:

http://www.eightforums.com/tutorials/15458-uefi-bootable-usb-flash-drive-create-windows.html

Personally, I just use the manual method of preparing a USB flash drive for a Windows installation, which is shown below the Rufus use section. It is really not difficult to create a USB bootable Windows installation media.

It sounds like your Windows 8 installation media is not right.

If your video card, etc, does not support UEFI, as you said, then you normally cannot select the "UEFI: ..." boot option in the boot order.

What you can do is, find the CSM option and set the Launch Storage OpROM Policy to UEFI Only in the UEFI before you start the Windows installation. That will give you some UEFI booting, but not 100%, since your video card does not have a GOP (UEFI) compatible VBIOS. You then can use the "UEFI: ..." entry of your USB installation media.

Set the Launch Storage OpROM Policy to UEFI Only, then Save and Exit the UEFI, go right back in, and then select the "UEFI: ..." entry for your USB installation media".

What is the source of your Windows 8 installation files? An ISO download?

If you do not maintain that CSM option to UEFI Only, you won't be UEFI booting at all, and your installation will MBR/legacy boot. You won't be able to use the Ultra Fast setting of Fast Boot unless you set CSM to Disabled and maintain it that way. But that will only work with a UEFI/GOP compatible video source, which your Intel integrated graphics should support.

I've installed Windows in UEFI booting mode in over ten different ASRock boards, some older and simpler than yours, and have never had a problem.
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pharazon View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pharazon Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2018 at 4:47pm
I got USB Boot to work on Asrock P4VM890 by enabling "Legacy USB Support" from BIOS.
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