I can still start windows from the HDD and I even did a system restore, but it did not help. 2. However, in Bios it is not shown as bootable and when I choose the new windows there's an error: 0xc00000e, the winload.efi does not exist. Windows Manager you can select Legacy/CSM Bios under Boot tab in the Bios. Here you will see the UEFI Bios. Here's some additional info: BIOS version: A08 (02/19/08) USB is not bootable. If you are still not able to see an option for USB device, I would suggest restoring the BIOS, and then try updating the BIOS again. 1. I plug it into my Dell Optiplex 755, but from the Boot menu, there's no option to boot from the USB drive. Restart computer press F2 to enter Setup (Bios) go to the Security tab. Thankfully, all is not lost because there is an excellent little tool called Plop Boot Manager which can do the impossible and allow you to boot the computer from USB even if the BIOS does not support it. Stuck on the boot menu screen and won't proceed. Change the option to USB, plug in your flash drive, and hit enter. When F12 = Boot Menu appears in the upper-right corner of the screen, press . Remove all other portable media like CD, DVD from the computer and power it on. When you have the CD booted, it should look like the picture below. I have included the document ' Restoring the BIOS ', as it will walk you through the steps on how to restore back to the last know good BIOS version. Bootable USB is not detected as a boot device. Bootable USB not showing up or recognized in bios. Plug a Bootable USB Drive into the USB port of your computer. you will find it in boot options ( not 100 % sure on lenovo but most bios its found in the boot options) and will require you to change from legacy to EUFI If its already in eufi then switch back the other way . Some computers have a different boot sequence, so you might need to change it. Boot options used to include Windows, USB and net. Go to the Boot tab. The bootable USB drive wasn’t made correctly – There’s also a chance that the issue is occurring because the bootable USB drive that you’re trying to use when installing, repairing or upgrading your Windows is not created correctly. Look for Secure Boot, and Disable it. After restore the trojan was gone, but also the option to boot from USB from the bios. Plop can boot different operating systems such as Windows or Linux from hard disk, floppy, CD/DVD or from USB. Im trying to install win7 from usb drive but cant seem to find boot from usb option in BIOS. If this option is not available, sign out of Windows 10, then hold down the shift key, click the Power menu, then click Restart. The UEFI Bios not … Can't boot from USB, even select the right boot option. Save and Exit, then your current USB Flash Drive will be listed as a bootable device under the F12 boot menu. This is the end, my friend, of my instructable. However after installing Ubuntu 16.04 and Windows getting a trojan (after hardly havin used the laptop), it was necesarry to restore Windows. I try to boot from the USB key. Find out the reason that make your bootable USB not working: USB format is not supported. Boot From Usb if Option not available in BIOS >HP Pavilion All-in-One I have a HP Pavilion All-in-One MS227 Desktop PC. So I go into BIOS, and find that in "Boot Sequence", the USB Device option is "not present". Note: You can skip steps 1 ~ 4 and start from step 5 in case you are certain that your computer is not set up to boot from a USB drive. m.elsayed00 you need to go into the bios and change the settings to accept the USB drive . Just press F2 when the computer starts up, and change the boot order or boot priority.