Insert the USB drive into the computer
Restart the computer
Enter the boot menu or BIOS/UEFI setup during startup
Use the required key for your device, such as F12, F11, Esc, Del, or F2
Select the USB drive as the boot device
Save changes if needed and exit BIOS/UEFI
Wait for the computer to boot from the USB
If the USB does not appear, enable USB boot or disable Secure Boot if required
If the USB still does not boot, recreate the bootable USB drive and try again