Windows 10 and iTunes sync problem

I've been following the forum here for 2 months waiting for a solution to pop up that will solve my issue, and none have as yet unfortunately, so I figured it's time for me to ask specifically.

I upgraded to Windows 10 in August, and since that day have never been able to sync my iPhone 5 to iTunes since. The phone shows up in iTunes, I can browse the music and videos on the phone and play them through iTunes, but the 'Sync' button Is grayed out, unavailable. The phone also will not sync over WiFi (that option is grayed out as well.) I'm running iTunes 12.3 now, and have tried several different fixes. Updating the Apple iPhone driver in the Device Manager didn't help (it comes up as MTP USB Device every time I go to update it, saying it is the most up to date driver. The Apple Mobile Device driver also shows as the most up to date.) A full tear down and reinstall of iTunes has not fixed it, and I've tried several times. These seem to be the two most common suggestions, and neither have worked. It seems like most people were having trouble with iTunes even recognizing their phones/iPads, and these fixed that. That isn't exactly the problem I'm having, so I'm not sure what else to do. Anyone else have this issue and find a fix?