You may try the following Removal Guide:Remove RocketTab ads (Virus Removal Guide)
In addition this is most informative:PUPs - Potentially Unwanted Programs - Basics
(Note): With-in the Removal Guide, you will be required to Download/Install Malwarebytes (Free)
To keep it (Free) DO NOT accept any Free Trials offers/ or active during the Installation process.
McAfee Volunteer Moderator