Temporarily disable Windows Defender or your third-party antivirus (like Avast or McAfee).
Error -75 is frequently caused by a physical connection drop. Even if the cable looks fine, it might not be maintaining the data transfer speeds required for a full restore. 3utools error unable to restore idevice75 link
Ensure that 3uTools has permission to pass through your Windows Firewall. 4. Use DFU Mode Instead of Recovery Mode 3utools error unable to restore idevice75 link