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05-07-2018

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Lenovo Flex 5 - Boot From USB

2018-05-07, 1:17 AM

Hi,

 

I recently got a Flex 5 laptop and am trying to set up dual boot windows 10 / ubuntu. I have a usb set up correctly (can elaborate if needed, but I don't think it is the issue) with ubuntu. However, the Flex 5 doesn't seem to be able to boot from a usb. In the BIOS there doesn't seem to be a legacy boot option; the uefi row is grayed out. When booting from usb within windows 10 - shift click restart and select boot from usb - a message pops up saying that there is no boot from usb compatibility and to select a different boot option, from which I can only select the default windows.

 

How would I boot from a usb?

 

If there is another way that I can get dual boot windows 10 / ubuntu that would also work!

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2 Posts

06-10-2018

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Re: Lenovo Flex 5 - Boot From USB

2018-06-10, 13:11 PM

you will have to disable the Secure Boot in BIOS (default is enabled, this blocks non-authorized usb).

 

I was able to successfully boot from USB on my new flex 5. 

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10 Posts

06-16-2017

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Re: Lenovo Flex 5 - Boot From USB

2018-06-14, 17:15 PM

Can you please give more specific instructions how to "disable the Secure Boot in BIOS."
My SSD failed, Lenovo installed a new one, and now I need to boot from Acronis recovery media on a USB to restore my backup.

Thanks.

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2 Posts

06-10-2018

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Re: Lenovo Flex 5 - Boot From USB

2018-06-19, 17:45 PM

first check out the video of access BIOS for your model, it might be slight different. 

https://www.google.com/search?q=thinkpad+access+boot+menu&oq=thinkpad+access+boot+menu&aqs=chrome..69i57.16319j0j7&sourceid=chrome&ie=UTF-8

 

After that, you can 

 

https://www.google.com/search?ei=_EApW-Uzx-bmArPXhcAH&q=disable+secure+boot+lenovo+thinkpad&oq=disable+secure+boot+le&gs_l=psy-ab.1.2.0l2j0i20i263k1j0i22i30k1l7.11385.14084.0.17649.3.3.0.0.0.0.139.385.0j3.3.0....0...1c.1.64.psy-ab..0.3.384...0i67k1.0.9DVQqTuZUc4

 

that should be clear. 

 

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1 Posts

08-23-2018

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Re: Lenovo Flex 5 - Boot From USB

2018-08-23, 4:09 AM

I am having Lenova Flex 5 -1570 laptop. I tried disabling "secure boot" option in the bios but did not help. I also noticed that there is a tiny hole next to power button. Should I insert a pin and press the button inside to change the boot option. I am trying to use USB 3.0 flash drive for Ubuntu 18. Please help!

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1 Posts

09-18-2018

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Re: Lenovo Flex 5 - Boot From USB

2018-09-18, 16:16 PM

I had the same issue and had to go into the other section of the bios , PC is reinstalling WIN 10 pro now so can’t see spisiffics but it was in like the 2nd or 3rd tab many hardware 

and it was the SATA raid type , switch from ACHI to Legacy and still disable secure boot , but should open all the settings you need. Use the pin hole button to start up and it gives you the boot menus

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11-14-2018

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Re: Lenovo Flex 5 - Boot From USB

2018-11-14, 2:11 AM

You will need to access the Bios by pressing F2 at startup and change SATA Controller Mode to AHCI. Once this is done you will be able to change Boot mode to Legacy. Save, reboot, and hit F12 at startup and you should see the option to select your USB...etc.

 

Hope this helps.

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02-16-2020

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Re: Lenovo Flex 5 - Boot From USB

2020-02-15, 23:26 PM

I have the same issue. I am unable to access BIOS using F2 or F12 keys. I was only able to access from the Settings menu. I do not see a Legacy Boot option. I have tried every piece of advice but still unable to boot from USB. I do not have an option to select Other OS for OS Optimized Defaults. I do not have the ability to set the Boot Mode to Legacy. Many options shown on screenshots are just not there for me. And I tried NOVO button (it's a pin press type on my machine) but nothing happens. Is there any walkaround? Appears that my machine may be thoroughly locked. Any script out there to unlock options? Thank you.

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02-16-2020

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Re: Lenovo Flex 5 - Boot From USB

2020-02-15, 23:52 PM

I only have one option in the boot menu, which is Windows Boot Manager. Another puzzling thing is I see Fast Boot option in the Boot tab. I tried disabling it and saving, but it always goes back to "enabled." I got my laptop as a gift, and I know that it came from Costco. I'm not sure if it custom-configured somehow to lock down the Costco edition. Any advice is appreciated.

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1 Posts

06-12-2020

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  • Message 10 of 10

Re:Lenovo Flex 5 - Boot From USB

2020-06-12, 15:59 PM

First shut down your computer. You will need to change your boot options by using a small pin (I used the pin that comes with an iPhone for removing the SIM card) and inserting it into the tiny hole to the right of the power button. Put pressure on the pin and then push the power button power-up the computer.

 

If you are trying to create a USB-bootable Linux iso, first create a partition on the hard drive that is not formatted to NTFS. I believe there also needs to be a small exFAT partition as well. Without these partitions set up, the Flex 5 can't figure out how to boot from USB. Look up how to create a USB-booted linux distro if you need to, it seems to work best with a brand new flash drive. 

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