Because there is no official Windows version of checkra1n, third-party tools like or iRemovalRa1n are used . These often fail if the UsbDK (USB Development Kit) driver is not installed .
"To work correctly, checkra1n must install a device driver." checkra1n app required to install a driver to work correctly
When the iOS device reboots, the jailbreak is lost. The checkra1n app driver is still installed (on the filesystem), but it is not loaded into the kernel. Re-running checkra1n from a computer re-triggers the bootrom exploit and reloads the driver. The in-app driver installation only needs to happen once after the initial jailbreak to place the files; thereafter, the computer-based jailbreak process reloads them automatically. Because there is no official Windows version of