Q: how do I add my phone to my windows 10 laptop?

does the same computer see it in OS X with the same phone and cables?

If so you may be running something on the Windows partition causing problem and you need to diagnose what you have running in Windows.

MCfromWashMO wrote:

 

I own an iPhone 6 and I am trying to connect it to my laptop (windows 10)   however, my computer is not "seeing" the iPhone connected.

What must I do next?

https://support.apple.com/en-us/HT204095

Try the steps in these articles. On the first one look at the PC section. If of no help try the second article to delete and update the proper driver.

If iTunes doesn't recognize your iPhone, iPad, or iPod - Apple Support

http://www.technipages.com/itunes-fix-iphone-or-ipod-not-detected-in-windows