This is probably too late but I really hope this can help you or others.
You may have encountered different errors during restoring and updating your device. You may have seen "This device cannot be restored Error " message from iTunes before and wondering what just happened. A common error usually exists because of just simple things. And so there are things you need to consider first when you're updating or restoring your iDevice. Here are some of those:
1, Stable Internet Connection.
2, Firmware Issue.
3, Security software.
4, USB cable and port issue.
Part 2: Common Solutions to Fix iTunes Error
Solution 1: Reboot your phone.
Solution 2: Replace the USB cable.
Solution 3: Checking your phone storage.
Solution 4: Restarting your computer and resetting your phone.
Solution 5: Look for more stable internet connection.
Solution 6: Update your iTunes.
Solution 8: Deactivating your antivirus.
Part 3. Fix iTunes Error by Setting Your Phone in DFU Mode
Part 4: Use FoneDog Toolkit to Fix the iTunes Error
Step 1: Choose "iOS System Recovery" Option.
Step 2: Connect Your iDevice to Your Computer.
Step3: Download Firmware.
Step 4: Start Repairing Your iOS.
Step 5: Repair Complete!
More information you can see the Guide: How to Fix iTunes Error Occurred While Restoring or Updating iPhone, iPad
Hope it can help you!
iOS System Recovery Guide How to Fix with Various iOS System Issues