: Restart your PC and enter the BIOS/Boot menu to boot from the USB drive instead of Windows.
refers to a community-distributed version of the checkra1n jailbreak tool tailored for Windows users. Official checkra1n releases are only available for macOS and Linux, as work on a native Windows version was delayed. Overview of the Tool justatech checkra1n 0.12.4 windows.zip
Do not download or run "justatech checkra1n 0.12.4 windows.zip" unless you are on a "burner" computer with no personal data. Use Checkn1x instead for a safe, verified experience. : Restart your PC and enter the BIOS/Boot