If you would like to use your Focusrite as the recording device but not as the playback device, navigate to the speaker icon in the bottom right corner of your pc, right-click the speaker icon.

Once you click on the speaker icon you will have an option to select the playback devices and recording devices, click playback devices. Select the playback device you would like to use then click set default (You should see a green checkmark next to the device selected). Navigate to the Recording tab, select your unit, click set default (You should see a green checkmark next to the device selected).