Make sure the WIRELESS indicator light on your VAIO computer is on.
When the WIRELESS indicator light is off, you cannot use the BLUETOOTH function.
Make sure the BLUETOOTH function is enabled.
Open the charms and select the Settings charm.
Select Change PC settings in the lower right corner, then select Wireless in the left pane.
Turn off Airplane mode and change the Bluetooth setting under Wireless devices to On.
To open the charms, see Opening the Charms.