I saw that other people were getting Driver Error's in Win10, but I think my issue is a bit different. I am able to connect and upload a build just fine (even with the Driver Error status), my issue is that I can't communicate from my new beans using Serial.write.
I have some old code with a old bean (first kickstarter) where I use Serial.write. The original bean, connects to my Win10 machine without the "Driver Error" status. I then have a c# app that connects to the bean and reads the data it writes. I haven't updated the original bean ever since I got this example working, and it still works now.
If I build/upload the same bean app to either a new bean or bean+, I can see it works fine, and the Serial.write is not returning false (I have it display red if that fails). However, my c# app throws exceptions when attempting to connect to the new beans. I can only connect to my original bean and I don't get why.