Finally! Now you can download Rockchip Driver v3.7 for Windows 8.1 from here,here Or here I can't wait to get home to test it. If you manage to test it on Windows 8.1, plese let us know it really works.
1.) Support Windows 8.1
2.) Support USB 3.0 controller on Windows 8/8.1
[Update] I didn't test it, but from the feedback received till now it looks like unfortunately even this driver does not work on Windows 8.1. So we have to wait