(1) First, make sure that you have the latest version of the iTunes (2) Restart your device (3) Connect your mobile with laptop/computer via USB cable (4) After that, you will see the option to "Update or Restore." For more detail, you can follow this guide. https://www.fonedog.com/ios-system-recovery/fix-iTunes-error-9.html

Well, it depends on the antivirus you are using. Antivirus sometimes bothers the users by blocking the programs and website from being open in the browser, and the only solution is to disable or close the antivirus. As I have Avast antivirus on my laptop. So the procedure is quite simple. (1) Right-click on the Avast icon from your taskbar (2) Move your cursor to the "Avast shields control" and select the time for disabling your antivirus. (3) A popup message will appear just click on "OK, Stop." Found these information from https://www.techcollaborative.org/