So I'll keep it short.
I'd try a new USB cable and make sure it's an Apple one. Some balk at the cost but the AmazonBasics are a nice alternative. If that doesn't play out there are tomes about having to try other USB ports on the PC or other PCs.
https://www.google.com/search?q=error+no.11&ie=utf-8&oe=utf-8#q=itunes+error+no.11+site:discussions.apple.com+iphone+4s finds those priors for more ideas.
My granddaughter has an iPhone 4s which now when connected to the charger displays the connect to iTunes display.
I've connected it to iTunes but the phone will not update or restore with an error no.11
The phone had previously been difficult to charge.
What could be the problem? Any ideas how to correct it?

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