Download the ISO file for the operating system you want to install
Insert a USB drive with enough storage
Back up any important data from the USB drive
Open a bootable USB creation tool
Select the downloaded ISO file
Select the USB drive as the target device
Choose the correct partition scheme and file system if required
Start the creation process
Wait until the process finishes
Safely eject the USB drive
Restart the computer
Enter the boot menu or BIOS/UEFI settings
Select the USB drive as the boot device
Follow the installation or recovery steps from the USB