IPhone 5 sync issue: Computer detects, but can't sync to iTunes?

IPhone 5 sync issue: Computer detects, but can't sync to iTunes?

Added (1). Title says it all. Plugged iPhone 5 onto computer. Detects it, also charges it. But iPhone is unable to sync with iTunes, thus preventing me from transferring music as well as other tasks.

PC OS: Windows 10
iTunes ver.: 12.3.0.44 64-bit (supposed latest version as of 10/11/2015)
iPhone 5 iOS ver.: 9.0.2
Carrier: Verizon Wireless

Try opening iTunes first and then plug in your phone