One particularly frustrating error that users encounter during a flash, restore, or upgrade process is:

Open your operating system's security center or third-party antivirus interface.

If the hardware connection is solid, the software parameters must be adjusted. Error -75 often occurs when attempting a "Retain User's Data" flash on a device with completely clogged storage or a broken file system map.

Check host interference

: Use an original Apple lightning cable or a high-quality MFi-certified one. Switching to a USB-A to USB-C cable

3uTools is an older software. Running it in Windows 7 compatibility mode can resolve driver conflicts.