Originally Posted by rpmjax
Does"Argument aid is invalid (must be Guid(aid).isEmpty()==false)" suggest anything, Stress?
"Argument aid is invalid" suggests that an invalid argument is being passed to something such as the automounter.
Guid suggests user's group identification number.
My guess is that the automounter is trying to mount a partition on the disk but it is unable to find the group id number for your user account.
Did you see that error on the host operating system or on the Windows virtual machine?
Also, is the Macintosh running Mac OS X or Linux? I'm guessing that this is an Intel Macintosh or it wouldn't run Windows in Virtual Box due to having the wrong CPU.
My ignorance of Virtual Box may be leading my thoughts away from the actual problem. I just don't know.