This will enable you to troubleshoot the settings of your operating system, along with performing repair operations such as reinstalls of the operating system that would not be possible from within the operating system itself. While the Dell Logo appears quickly press F 12 Key. Booting your Dell Workstation from a USB device will allow you to enter into a non-native operating system (such as DOS). I am wanting to buy a laptop and either a new motherboard for my existing computer or a whole new computer, but I need to be able to disable external boot options as mentioned in â¦ Change boot-order to boot from USB in Dell Inspiron 15 5000 On a laptop, the USB ports are typically on the sides of the housing, while desktop computers typically have the USB â¦ If you have other ports in your computer being taken up by USB devices like external displays or wireless mouse receivers, they could be interfering with your computerâs ability to process your USB device and boot your new operating system. Step 2 : Plug your USB drive in to your laptop and while laptop is off. This almost annoys people because they canât access Windows data. Uninstall the other USB devices and try again. In case you do not have a Bootable USB Drive, you can still create one right now by going to another computer running Windows 10 operating system. Using Universal USB Installer is the easiest way to create a live Linux USB or bootable USB. The process will automatically start and you will receive a ready bootable USB Flash Drive. If the USB boot option is not first in the boot order, your PC will start "normally" (i.e., boot from your hard drive) without even looking at any boot information that might be on your USB device. Step 3 : Now your USB is plugged , Turn on you Laptop. In order to Boot Windows 10 from USB Drive, you will need to get hold of a Windows 10 Bootable USB Drive which you must have already prepared, to deal with this kind of a situation. Windows boot problems are always common for Windows users. Plug your USB flash drive into your computer. The process will automatically start and you will receive a ready bootable USB Flash Drive. BIOS only supports MBR. Change boot-order to boot from USB in Dell XPS. First of all you need to know it it has UEFI or BIOS. UEFI supoorts both MBR and GPT. If you made the USB bootable from CMD method, it will be MBR that's bootable for both. Insert the bootable USB drive into an open USB port on your computer. I suggest using Rufus for that. The USB flash drive should plug into one of the rectangular USB ports on your computer's housing. All you need to do is selecting the ISO file, your Flash Drive and, finally, Click Install. Step 4 : You will get Boot menu of laptop , Now Select âUSB Storage Deviceâ and Hit Enter Key. Turn your Dell laptop off; It is not necessary to change the Boot order in your Dell XPS 15 9570. Click the Start button and then click the Power icon so you can see the Shutdown options. 3. Take out your other USB storage devices. If you are not one of those people who have trouble setting up Dell UEFI via USB and can not boot Windows after trying many online tips, do not worry, here is an article to help you To start your Dell computer in Windows 10 /8.1/8. 3. Step 1 : Create a Bootable USB drive, if you donât have.