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This is my first time replacing an OS with Linux. I want to replace windows with Ubuntu 12.10 on my Asus X401a. The laptop does not have an optical drive so I need to use a USB stick.

I've read all the topics I can find on the topic of installing on this particular machine to no avail. It seems that no one has a problem getting the USB stick to boot.

I have written the iso to USB using Startup Disk Creator, I disabled safe-boot, and fast-boot on the laptop but when I enter the bios and tell it to boot from USB (UEFI: CBM) it still boots into Windows 8. I've tried disabling all boot options except USB and it just boots right back into the bios.

Any help would be greatly appreciated as I bought this laptop specifically to run Ubuntu.

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  • got mine yesterday asus x200ca with win 8 and touchscreen - followed this and thanks!!! - power then f2 no function key for the bios - boot tab -> fast boot disabled, launch csm enabled then security tab and secure boot disabled - save and exit then at reboot hit escape to get the boot chooser screen - did not work with the sdcard slot but the sdcard worked fine in a usb sd adapter - you can use ubuntu or even xubuntu but you have to use something with 13.10 not older - everything works out the box just fine
    – user248954
    Feb 16, 2014 at 21:01

3 Answers 3

Reset to default
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Well, after much trial and error (and ignoring work and sleep) I figured out the proper settings in the bios. So here you go:

Under 'Security' disable 'Secure Boot Control'

Under 'Boot' disable 'Fast Boot', then enable 'Launch CSM', then enable 'Launch PXE OpROM'

Save changes and restart. On restart press the esc key and choose to boot from USB.

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  • These settings allowed me to boot my new Asus machine with a Ubuntu install disk.
    – ddoxey
    Dec 14, 2013 at 16:20
  • Not sure why this is not marked as the accepted answer; worked like a charm! Thanks @jason.
    – Mike
    Jul 1, 2015 at 13:28
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Well in my case, I have to put, f2 for access bios, and change 2 things, firts Under 'Security' disable 'Secure Boot Control' second enable 'Launch CSM', then enable 'Launch PXE OpROM'

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I used f2, but I found that I had to press and hold f2 before pressing power. I release f2 once in the BIOS setting. Otherwise, it went into Windows set-up.

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