I get this error when I try to add USB wireless adapter to my running Kali Linux.
Failed to attach the USB device Realtek Semiconductor Corp. RTL8812AU 802.11a/b/g/n/ac WLAN Adapter to the virtual machine Kali-Linux-2016.2-vbox-i686_1.
USB device 'Realtek Semiconductor Corp. RTL8812AU 802.11a/b/g/n/ac WLAN Adapter' with UUID {cb3700a9-5075-4cf4-8ad0-84772145a1ae} is busy with a previous request. Please try again later.
Result Code: E_INVALIDARG (0x80070057)
Component: HostUSBDeviceWrap
Interface: IHostUSBDevice {c19073dd-cc7b-431b-98b2-951fda8eab89}
Callee: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}'
I'm using a laptop, so I think there could be problem between my integrated wireless device and USB wireless adapter.
I had the same problem but I found a solution.
Follow these steps:
VirtualBox-5.1.28-117968-Win.exe) and their extensions (Oracle_VM_VirtualBox_Extension_Pack-5.1.28-117968..vbox-extpack)C:\Program Files\Oracle\VirtualBoxNew) and execute the installer of the new VirtualBox version. Make sure to install in your new directory.Try the newly installed version of VirtualBox...
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