Connect your device while it is in or DFU Mode .
To troubleshoot:
: If 3uTools continues to fail, attempt the restore using the official Apple Devices app or iTunes to see if it provides a more specific error code. 3utools error unable to restore idevice--75-
Temporarily disable Windows Defender or your third-party antivirus (such as Avast, Norton, or McAfee).
Below is a drafted troubleshooting guide to address this error systematically. Phase 1: Hardware and Connection Stability Connect your device while it is in or DFU Mode
If the firmware installation still halts instantly at the exact same location after trying the steps above, the issue is likely rooted in physical hardware components inside the iDevice.
This is the most frequent cause. If a cable isn't MFi-certified or has internal fraying, it can drop the connection the moment the restore process puts a high load on the data transfer. Below is a drafted troubleshooting guide to address
3uTools is an older software. Running it in Windows 7 compatibility mode can resolve driver conflicts.