Install the apps on your computer:

Logitech Unifying Software – Logitech Support + Download

 

1- Turn off and disconnect all other Bluetooth devices from your laptop.

2- Plug in the unifying receiver you would like to configure 

2- Open the Unifying Software app, go next 

 

4- Turn on the device you like to pair


5- For keyboard, test typing.

 

6- For a mouse tick Yes, then next

7- Choose between Finish or Pair another device (repeat the process until you've added all the devices you want)