The computer does not recognize your Walkman even if connected by USB cable.

• The USB cable is not connected to a USB connector on your computer properly.

• Disconnect the USB cable, and then reconnect it.

• Use the supplied USB cable.

• USB debugging is enabled.

• Some devices or software may not recognize your Walkman when USB debugging is enabled. Tap the (Menu) button, then tap [System settings] - [ Developer options] - [USB debugging] and uncheck the box.

• A USB hub is being used.

• Your Walkman may not be recognized by the computer if using a USB hub. Connect your Walkman directly to the computer’s USB port.

• The USB connector on your computer may have a problem.

• Connect your Walkman to another USB connector on your computer.

• When you use your Walkman for the first time, or when the battery is low, the battery symbol may be displayed and you may not be able to use the Walkman. This is not a malfunction. Wait for about 10 minutes before attempting operations.

• Software authentication may take some time. Wait for a while.

• Software installation failed.

• Reinstall the software using the installer. Imported data will remain unchanged.

• If the problem still persists after performing the remedies above, press the RESET button to reset your Walkman. [Details]