I'm using Oracle VM VirtualBox Manager 4.3.10_Ubuntu as a Virtualization solution.
I've installed Windows 8.1 x64 for some usb devices that Linux does not have compatible software (Polar Pro Training 5).
At first i could not see any actions when selected on Virtualbox side.
After adding my username with
sudo adduser yourusername vboxusers command Windows recognized all usb devices plugged in. But at the "Device Manager" tab, there is a exclamation mark. Although Windows try to install drivers for the usb nothing happens. This occur for all usb devices.
Here is screen shots of my device manager.