Sony PCG-NVR23 - Manual (Page 152)

When I click a program icon, the message "You must insert the Application CD into your optical drive"
appears, and the program does not start.
 Some titles require specific files that are located on the Application Recovery CD. Insert the disc, and try starting the
program again.
 Make sure you place the CD in the tray with the label side facing up.
 Make sure the optical drive is connected to your computer. See Using the Optical Disc Drive for more information.
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