If the error persists across different computers and cables, it may be a hardware issue.
: Open 3uTools and click Check Update in the bottom-right corner to ensure you have the latest bug fixes. 3utools error unable to restore idevice--75-
: Third-party antivirus or firewalls blocking the restore process. If the error persists across different computers and
Software mismatches between 3uTools and the Windows driver environment can trigger error -75. cutting the connection.
Antivirus programs can misinterpret the flashing process as a security threat, cutting the connection.