iphone 8s won't update in itunes
iPhone 8s won't update in iTunes. I've rebooted both with no luck. My iPad updated fine. Usually I simply open iTunes, and it tells me there is an update. I have the latest iTunes also. Once I connect my apple cord to PC, my phone comes up, then I click on the phone, and click update. It starts to extract , then backup, it almost starts, then no
When I YouTube search, there are a few downloads that say it will fix, but I am very careful not to do that. Please advise. Thanks in advance.
Windows, Windows 6