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I've tried installing with an usb-stick, and have come to the install-menu, getting the options to install or run ubuntu from usb - but no matter the choice, I end up with the error "(initramfs) unable to find a medium containing a live file system." I've read that it often helps to change to an usb 2 port, but I don't have any.

I'm using an acer aspire V nitro Trying to install 14.04.3 LTS on a partition.

UPDATE- I ran ubuntu with a live CD on another PC, and restored disk image, as described in answer below. Still initramfs-error.

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  • 2
    how have you installed ubuntu on USB - what instructions? Have you verified the md5sum for the ISO?
    – fossfreedom ♦
    Dec 23, 2015 at 23:41
  • DId you disable secure boot on BIOS?
    – albertoefg
    Dec 24, 2015 at 1:18
  • I tried -- same result. I installed it on the usb using the universal usb installer.
    – Ziltoid
    Dec 24, 2015 at 12:16
  • md5sum checks out. Anything else I can try?
    – Ziltoid
    Dec 24, 2015 at 12:17

2 Answers 2

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Step 1 : To be safe, download Ubuntu 14.04.3 ISO again.

Step 2 : Create a proper Ubuntu USB installation media :

Open command prompt as administrator and execute : 

diskpart
list disk  
select disk *  
clean  
create partition primary  
active  
format fs=fat32 (quick)  
assign letter=**  
exit

Note : * = number of USB drive | ** = select a free drive letter

Mount the Ubuntu ISO and copy the content to the USB drive.

Step 3 : Disable hibernation mode and fast startup - execute :

powercfg /h off

Open the legacy version of the Windows Control Panel - not the modern one.
Select Power Settings - enable show hidden settings - uncheck fast startup.
After having done this - shutdown the computer completely - do NOT reboot.

Step 4 : Boot from the Ubuntu USB installation media you have created and ...

Update addressing your response that the install media still doesn't work

In case you have access to a an Ubuntu system, you can create the media by :
Open Disks and select Restore Disk Image from the menu on the top right.
Choose the Ubuntu installation ISO file and the USB drive ... start restoring.

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  • I followed the instructions, but ended up with the same initramfs-error... I used poweriso to mount the image. Any other suggestions? Thanks for your help
    – Ziltoid
    Dec 25, 2015 at 14:18
  • @Oyvach : In Windows 10 you can mount the ISO image by right-clicking the file in File Manager and select mount. Please try it again ... repeat the complete procedure of step 2 (creating the installation media). :)
    – cl-netbox
    Dec 25, 2015 at 14:21
  • @Oyvach : I updated the answer with an alternative solution to create the media properly from within Ubuntu. This way is proven to work in nearly all cases - when there is no problem with the USB drive. :)
    – cl-netbox
    Dec 25, 2015 at 14:49
  • Ok, it didn't help to do the mounting in w10, though it was easier :) I don't have any machines with ubuntu available. I tried running wubi.exe from the extracted iso, within Windows 10. And finished the installation. When rebooting, I'm asked to choose OS -- when choosing w10 everything goes as it should, but when choosing Ubuntu im prompted with a black screen "Windows task manager", saying that Windows couldn't start, referring to file "\ubuntu\winboot\wubildr.mbr" and status: "0xc000007b".
    – Ziltoid
    Dec 26, 2015 at 16:29
  • @Oyvach : It is not recommended to use Wubi as installation option since of some time ago - please read : omgubuntu.co.uk/2013/04/wubi-advice - unfortunately you have to find another way to create a media. :)
    – cl-netbox
    Dec 26, 2015 at 16:38
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I fixed this by:

1) Buying an USB CD-Rom

2) Connecting it and booting from the live CD

3) Doing the regular installation and choosing install along With Windows.

I did not get the booting from the USB to work With my PC

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