Button to browse the usb drive to locate the downloaded file. Sometimes the above method will not display the usb drive as a bootable option.
In post behavior select fastboot the select the thorough option figure 1.
Dell bios usb boot. Select bios flash update in the other options section. Go into setup and turn secure boot off and csm legacy boot on. At the dell logo screen press f12 to access the one time boot menu.
Insert the usb drive into any usb port. First and foremost turn off your. You will need this info later.
When boot menu comes up select usb device. When the dell logo appears hit f12 till you see the boot menu. Bios setting to boot usb uefi stick the answer above is correct.
The system will now boot to a command prompt and display c you now have a bootable usb drive. This method uses f12 to open the boot screen and select usb boot. Restart the system and at the dell logo press f12 to enter the one time boot menu.
If you are going to use this to update the system. F12 on the dell logo you will see one time boot menu select the device which you have connected usb hard drive flash drive make sure you have already installed the os in that drive earlier. Turn on the computer and quickly press the f12 key on the screen where the dell logo appears until you see preparing one time boot menu.
Then restart and with the bootable usb device already installed. Go in your usb key and enter the efi and please notice the name of the files here as grubx64 efi unsecure boot or shimx64 efi secure boot. The usb drive does not need to be bootable device.
Keep pressing f2 then f12 then f2 then f12. Select the file and click ok. Then you need to insert the media into a usb port or dvd drive.
Select the usb storage device to boot to the usb flash drive. In this case you may have to. Boot from external usb drive or usb stick the basic and the simplest way is f12 whenever you want to boot through a external source os.
Select the thorough setting. Power on the system. In system configuration select usb thunderbolt.
Restart the pc with the usb plugged in. In the boot menu you should select the device that matches your media type usb or dvd under uefi boot. How to boot from usb on a dell inspiron xps.
Temporarily attached devices like flash drives are accessed through the f12 one time boot menu. At boot press the f2 key or alternately press the f12 key then select the option to enter the bios setup. Shut down your pc.
On uefi systems the boot order list for local storage devices only includes paths that have been formally registered into the firmware which is typically done during os installation.