How to boot from USB flash drive? Here are two cases about setting your computer to boot from USB flash drive by changing boot order in BIOS SETUP. There are some differences such as Entry Key and menu options in various BIOS model and computer model. If you cannot find the example to match your computer, you can take one of them for reference because the key steps are the same.
1. Press BIOS Entry Key to access BIOS setup utility.
2. Open boot option.
3. Select the USB drive as the first boot device.