Disable any antivirus software temporarily, as these tools are often flagged as "false positives" due to their exploit nature. :

This is common with "checkm8" tools. Simply unplug the device, restart it, put it back into DFU mode, and try again.

On the desk lay an iPhone 7, looping endlessly in a boot loop. It had been bricked for three weeks. It wasn't just a phone; it was the last digital archive of his sister’s photos before she passed away. Elias had tried everything. He had tried the standard recovery mode, DFU mode, and a dozen different third-party "repair" tools that promised miracles and delivered nothing but credit card charges. The device was stuck in a purgatory between life and death, tethered to the computer by a fraying USB cable.