Hi all I'm new to here I just wanted to post what worked for me. So I have been printing with arduinos for awhile now and have been using a due with my own modified and diy built ramps fd v2.2. It had been working just fine for months, then I upgraded windows 10 from 1607 to 1703 and it stopped loading code. I kept getting error no device found on com3. The weird thing was if I hooked it up to my wife's all in one with 1607 it would load fine. I played around with it for days and finally stumbled across this, I loaded the arduinos isp example code through the native port and then tried it on the programming port and what do you know I was able to load code! So then I tried my repetier firmware and it worked! Thanks I hope this works for others.