hey guys, my girlfriends computer has been getting this one particular error message and its really odd. i hope its not some kind of virus or something. hopefully someone will be able to clue me in... it has a red stop sign looking icon with an exclamation mark and it reads, " You have inserted a disk containing no volumes that Mac OS X can read. To continue with the disk inserted, click ignore". Now the thing is, there is no disk inserted and it has been popping up randomly since yesterday every once in a while.