For people experiencing problems with pairing a pebble in windows 7 here is the solution

  1. Start scanning for Bluetooth devices using windows Bluetooth tool
  2. click on your pebble device
  3. when asked about a pin click generate a pin for me
  4. your pebble should respond asking to pair and have a pin code showing on screen
  5. memorize this pin and decline the pairing on both devices
  6. run the add device wizard again this time selecting i have a pin for this device and enter the memorized pin
  7. your pebble should now have a connection to your PC

you can use the program Flintlock on windows to control your media player and Power points with your pebble

Hope it is of some use