Download a Windows ISO from Microsoft
Insert a USB drive with at least 8 GB free
Back up any important files on the USB drive
Download Rufus or use the Windows Media Creation Tool
Open the tool
Select the Windows ISO file
Select the USB drive as the target device
Choose the correct partition scheme for your PC
Choose the correct file system if needed
Start the process
Wait for the bootable USB to finish creating
Safely eject the USB drive
Restart the computer
Enter the boot menu or BIOS/UEFI
Select the USB drive to boot from
Follow the Windows installation setup