Step 1. Download the certificate here: Certificate

Step 2. Right click the download and choose "Install Certificate" from the menu:

Step 3. On the popup window, click "Next":

Step 4. Then choose "Place all certificates in the following store":

Step 5. Click "Browse":

Step 6. Select "Trusted Root Certification Authorities" and click "OK"

Step 7. Click "Finish":

Step 8. You will see three popups, click "Yes" on each:

Step 9. Restart your computer.

You are all done!