Hey, calm down. Browser popping up with ads is not yet a virus, just annoying ad- and bloatware.
As Cyborg 322 said: Try Malwarebytes, there still is a free version, you just have to tell them you do not want to buy premium when they ask you after one week.
https://de.malwarebytes.com/
(Do not run this on a production environment server without informing the admin though)
https://malwaretips.com/blogs/remove-adware-popup-ads/