If you find a genuine old license key for version 1.71, you can still use it. But most "Full ISO" downloads circulating today are cracked.

Once complete, the program gives a report (e.g., "100 bad sectors detected, 98 repaired"). Power off your PC, remove the bootable media, and restart normally. You should run chkdsk /f in Windows to fix any logical errors afterward.

dd will overwrite any data on the target device. Use lsblk (Linux) or diskutil list (macOS) to confirm the correct device.