To fix iPhone updating error 1， try the below methods: 1. Make sure that your CPU is up to date and iTunes is the latest version 2. Updating with another computer 3. Downloading .ipsw and check the host files 4. DFU mode 5. Anti-virus programs will silently screw you over and over, so close it or even temporarily uninstall it from your computer 6. Clear DNS cache. Hit the Windows key on your keyboard >Type cmd >Right click & run cmd as administrator > Type "ipconfig/flushdns". Hope this helps. Watch this video to learn more: How to fix iPhone updating/restoring error 1 and recover lost data.