I have had this same problem and took it in to London Drugs where I bought it, to be repaired. The guy was great. He said that the problem is the Sony software upgrade is clashing with the disc drivers and causing it to not work. He did fix it for me - free of charge - but warned that each time there is a software update from Sony, the problem will arise again. If anyone knows of a more permanent fix, I would love to hear it.