Install Bitdefender on Windows computers, laptops, tablets VIDEO - How to install Bitdefender on Windows 1. Go to the PC you want to protect and sign in to your Bitdefender Central account. If you don't have an account already, please sign up for one. 2. Select the My Devices panel. 3. In the My Devices window, click + Install Bitdefender products on your devices. 4. A new window will pop up.