Open the Device Manager application from your applications menu. The application will appear on the bottom right of the screen:

First, you need to connect, or pair, your computer to this WeDo 2.0 device. You need to do this only once. If you have done this before, you can skip ahead by selecting Yes, Skip to Scratch in the Device Manager and clicking this link to skip ahead in this window.
If this is your first time setting up your computer with this WeDo 2.0 device, click No, open Bluetooth Settings on the Device Manager. Clicking this button should automatically open your computer’s Bluetooth settings menu:

If the Bluetooth settings menu doesn’t appear, you can open it manually. Click the Start button on your desktop and type Bluetooth. Select Bluetooth settings from the list of search results.
If Bluetooth doesn’t appear in your results, please go to our Troubleshooting section.