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USB Flash Drive not showing up in BIOs

Last response: in Motherboards
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January 21, 2014 9:39:22 PM

Hey guys, I'm making the move up to windows 8.1 from windows 7 but here's my problem. I have everything ready to go for install but my problem is when I start up and go into bios to select my flash drive as the bootable device says disabled. How would I go about enabling it?

EDIT: My mobo is a Asus Crosshair V Formula Z
a b V Motherboard
January 21, 2014 9:46:47 PM

Is there a lock switch of somesort on the drive itself ?
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January 21, 2014 9:47:50 PM

patrick47018 said:
Is there a lock switch of somesort on the drive itself ?


No, it's just your usual flash drive. I did just check and there is not one.
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January 21, 2014 9:52:17 PM

Enable the option to boot on flash drives on your BIOS.
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January 21, 2014 10:15:41 PM

cinnamon cider said:
Enable the option to boot on flash drives on your BIOS.


Tried it, took me straight to my regular start up screen.
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January 21, 2014 10:31:33 PM

Does the flash disk show up on your boot options? Try to select the booting device manually. Also check if you made your flash disk as a boot drive properly.
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a b V Motherboard
January 21, 2014 10:33:01 PM

Set it to boot from the flash drive before the HDD, change boot order
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January 22, 2014 11:00:32 PM

Ugh, went through hell today. Last night I got it to boot up and was ready to install. The installer prompted me to format my hard drive so I did, then it told me it could not install. My backup was basically erased with my Windows 7 OS, and I didn't have a recovery disc (that I could find, at one point I did.) So I got W7 and then it told me my HDD was gpt partioned. Given up all hope, then I threw in an old hdd from a computer I haven't popped open in 2 years. Worked like a charm, first thing I did was fix my 1TB I would've preferred to have it on. Not going through that again, I'll wait until windows 9 arrives thank you very much.
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a b V Motherboard
January 23, 2014 1:18:25 AM

Did you try booting via UEFI? At least my mobo has the options Legacy or UEFI or Both.

Also, may not apply here but I had trouble with USB devices in Linux. No USB device worked, no keyboard, mouse or anything...until...I enabled IOMMU in BIOS.
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January 23, 2014 5:10:39 PM

mamasan2000 said:
Did you try booting via UEFI? At least my mobo has the options Legacy or UEFI or Both.

Also, may not apply here but I had trouble with USB devices in Linux. No USB device worked, no keyboard, mouse or anything...until...I enabled IOMMU in BIOS.


Yeah, I tried every setting imaginable.
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Best solution

a b V Motherboard
January 24, 2014 6:24:41 AM

In BIOS

Under Advanced tab

Legacy USB support - Enabled
USB ports - Enabled


Under Boot tab

USB support - FULL Initialization (the other settings wont detect ALL your USB-devices)

Also check the "OS Type". It has 2 options, Win UEFI and Other OS. Try switching that too if the above didn't work.
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