It seems that any USB device that I try to use within VirtualBox
throws up this error. It's like the device is busy and won't
let it be used. The error occurs when I try to put the black
check beside the USB Device.
One of the Errors:

Here is what I have done to try to make my USB devices work.
Maybe I've done something wrong? Could someone
tell me the correct way to make USB devices work?
My Settings:
