We help IT Professionals succeed at work.

EFI USB Boot issues

Irwin W.
Irwin W. asked
on
113 Views
Last Modified: 2016-10-09
I have a new swanky Lenovo Yoga S260 laptop.

I am attempting to downgrade it to Windows 7 but having some issues.

I have created a bootable USB thumb drive and verified it works but just not with this Yoga laptop.

One other thing to note is that secure boot is disabled so that USB booting is permitted.

Here is a screenshot of the error I receive.

EFI Boot error
Comment
Watch Question

Pawan KumarDatabase Expert
Awarded 2016
Top Expert 2016

Commented:
Try to reboot in DOS mode or Safe Mode.

Also check whether the BIOS detects the motherboard.
Irwin W.There are a 1000 ways to skin the technology cat.
CERTIFIED EXPERT

Author

Commented:
This is a Windows installer USB thumb drive . There is no booting into. DOS.

This computer is a uefi only bios.

As mentioned this bootable thumb drive works on other computers.
David Johnson, CDSimple Geek from the '70s
CERTIFIED EXPERT
Distinguished Expert 2019

Commented:
You have to select which boot from USB, MBR or UEFI.  With my Bios I use the F8 key on boot and I will see various options i.e.
DVD
DVD UEFI
USB
USB UEFI
Hard Disk 1
Hard Disk 2
...
Hard Disk 8

If I have both a dual boot DVD and USB drive connected
CERTIFIED EXPERT
Distinguished Expert 2019

Commented:
if you point it to the correct boot device - it should be able to boot
you can also test the usb device on other usb ports - usb 2 or 3
CERTIFIED EXPERT
Most Valuable Expert 2015

Commented:
Make sure the USB stick is formatted to FAT32. If it uses NTFS you can't boot it in EFI mode.
noxchoIT Product Manager
CERTIFIED EXPERT
Top Expert 2009

Commented:
Ditto rindi. Is it FAT formatted?
Irwin W.There are a 1000 ways to skin the technology cat.
CERTIFIED EXPERT

Author

Commented:
As mentioned in my original post; "I have created a bootable USB thumb drive and verified it works but just not with this Yoga laptop."

Also, this flash drive is selected from a boot menu using the F12 key. F8 is not an option on the Lenovo BIOS.

The drive is properly formatted using these commands:
-diskpart
-list disk
-select disk 1
-clean
-create partition primary
-select partition 1
-format fs=fat32 quick
-active
-assign
-copied ISO files to flash drive
-made efi\boot dir
-copied \windows\boot\efi\
......etc

Any other suggestions?
CERTIFIED EXPERT
Most Valuable Expert 2015

Commented:
Use the tool "WinSetupFromUSB" to create the boot stick. It is easy to use and works well:

http://www.winsetupfromusb.com/
Irwin W.There are a 1000 ways to skin the technology cat.
CERTIFIED EXPERT

Author

Commented:
Same issue with this tool.
CERTIFIED EXPERT
Most Valuable Expert 2015

Commented:
If your PC has USB 2 ports, try booting from those. If not, check the BIOS settings, you might be able to change how the USB ports work.
Irwin W.There are a 1000 ways to skin the technology cat.
CERTIFIED EXPERT

Author

Commented:
All ports causing the same issue.
CERTIFIED EXPERT
Most Valuable Expert 2015

Commented:
Did you check the BIOS whether there is something you can tweak for the USB ports?
CERTIFIED EXPERT
Distinguished Expert 2019

Commented:
test the stick on another system - it can be bad,
or there is something wrong on this system - are you on the latest bios update?
There are a 1000 ways to skin the technology cat.
CERTIFIED EXPERT
Commented:
This one is on us!
(Get your first solution completely free - no credit card required)
UNLOCK SOLUTION
Irwin W.There are a 1000 ways to skin the technology cat.
CERTIFIED EXPERT

Author

Commented:
Self resolved.

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Unlock the solution to this question.
Join our community and discover your potential

Experts Exchange is the only place where you can interact directly with leading experts in the technology field. Become a member today and access the collective knowledge of thousands of technology experts.

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.