Sony VAIO computer - Manual (Page 164)

Why does my computer freeze when I try to read a disc?
 The disc your computer is trying to read may be dirty or damaged. Follow these steps:
1. Restart the computer by clicking Start, Turn Off Computer, and Restart.
2. Eject the disc from the optical drive.
3. Examine the disc for dirt or damage. If the disc is dirty, see How do I maintain CDs and DVDs? for
instructions on how to clean it.
Page 164