Your R500 Laser Presentation remote uses Bluetooth low energy (LE) technology and is not compatible with Windows 7 computers that don’t support Bluetooth low energy. 

Your R500 is compatible with Windows 8 computers that support Bluetooth low energy.

If you aren’t sure if your computer supports Bluetooth LE technology, please contact the computer manufacturer. You can always use your R500 remote with the Logitech USB receiver that comes with it.