I'm in the process of ripping all of my CDs to my laptop via iTunes (lossless). Every now and then a loaded CD doesn't appear on the left hand side of iTunes. The CD is definitely being read by the drive, because in Windows Explorer the cda files are visible. As iTunes is the default player, the program loads when the said disc is inserted into the machine. The CDs are in perfect condition, and I have 'error correction' is checked. My updates are current. Oh and these are proprietary CDs, not copies. Anyone experienced this or have any suggestions?