virtualbox.org

I have a Samsung portable BD writer (model SE-506). I tried placing it as a USB exception for Windows 8 (the host being MacOS 10.8.3).
The following error appears:
"USB device 'MediaTek Inc MT1956' with UUID {3ef89723-2e81-4851-8976-58a30781ac8a} is busy with a previous request. Please try again later."
Later doesn't work. Any ideas?

Thank you for your Google insult and lack of actual response.

I'm only willing to answer that question a few times each week. Google search should be sufficient to find the previous answers. Did you try it?