My problem is that nothing is working. I have tried everything, I've gone to device manager and tried fixing it that way. (It says I have the most up-to-date drivers). Also, it has been said that the new version of Arduino has all the drivers for 8.1. If that is true,why isn't it working?? I've downloaded CP210xVCP and that has done nothing. I've uninstalled and done reinstallations, everything. Does anyone have any suggestions? because I have literally spent the past 3 hours trying to fix this problem. Thanks!
For Windows 8.1 users, having Port Serial problem,
follow this, helped with this problem 100% for me..:
Credit to: beachedwhale