If you are using an IBM ThinkPad laptop, you can turn on or turn off your Bluetooth radio
using the function key:
1. Press <Fn> and <F5> keys down together. You will see the Wireless Radios screen showing up.
2. Click "Radio On" to turn on Bluetooth radio, if the status is "Off".
3. Click "Radio Off" to turn off Bluetooth radio, if the status is "On"
as shown in the picture:
4. Click "Close" to close the Wireless Radios screen.
WARNING: You should turn off Bluetooth radio on your computer all the time
except when you need it for connecting to other Bluetooth devices.
This prevents others hacking into your computer through Bluetooth radio.