Both 5.4.3.2 and 5.4.3.4 are having the same problem on my machine. At first both were working fine. After just a little bit neither of them would show that an image was mounted. (i.e. Both would change the drive name from DVD Drive to CDROM Drive but explorer would not show anything for the total size or free space.) If I double clicked on the drive windows tells me to insert a disk. However if I draged the drive to a media player the player would play the mounted disk.