Remove Fake Windows Ultra Antivirus by Britec
This infection was designed to silently install on users systems and con them into purchasing fake software that don’t really work. Windows Ultra Antivirus is similar to other rogue infections.
https://www.malwarebytes.org/
https://support.kaspersky.com/downloads/utils/tdsskiller.exe
https://www.carifred.com/uvk/index.php
https://www.surfright.nl/en