The BLUETOOTH wireless technology has an authentication function, which allows
you to control communication with other devices.
The authentication function helps you prevent unwanted anonymous BLUETOOTH
devices from accessing your VAIO computer. The first time two BLUETOOTH
devices communicate, a common passcode (a password required for
authentication) should be identified to register both devices. Once a device is
registered, there is no need to re-enter the passcode.
For details, open Windows Help and Support (

Opening Windows Help and

Support

), and enter "BLUETOOTH" in the search box.

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