Here's how to get rid of the malware. When the Windows Defender notification pops up, open the action center and click the options to clean the problem. When the task window opens (shown in your post), click on the "Actions" tab and a dropdown menu appears. Select "Remove". Then click the button to "Apply" your selection and it will remove one copy of it. Windows Defender will only remove one copy at a time, and it will try to "Disinfect" any other copies it has detected. So when the notification pops up again, repeat the process selecting "Remove" until all copies of Win32/SupTab!blnk have been removed. FYI--Windows Defender can't actually "Disinfect" or "Quarantine" it, so just select "Remove."