id summary reporter owner description type status component version resolution keywords cc guest host 5940 Can't change mounted ISO Andrzej Borucki "I have attached my ISO. If I want mount VBoxGuestAdditions.iso, it shows: Could not mount the media/drive 'C:\PROGRA~1\Sun\VIRTUA~1\VBoxGuestAdditions.iso' (VERR_PDM_MEDIA_LOCKED) Details:E_FAIL (0x80004005) Component:Console Interface:IConsole {6375231a-c17c-464b-92cb-ae9e128d71c3} Called function: IMachine {99404f50-dd10-40d3-889b-dd2f79f1e95e} Only I can cancel or unmounting, if I choose unmouning I can't mount until restart VirtualBox system. " defect closed other VirtualBox 3.1.2 worksforme Linux Windows