Costmin is an adware infection that injects intrusive advertisements into web sites that you are browsing and constantly opens up new pages that you do not request. When it injects these advertisements it will do so in a way that makes the web site almost unusuable. The ads will overlay the content on the page and when you click on a link, it will just open a pop-up to another advertisement. This causes web browsers to become slow, freeze, and almost impossible to browse the web.
This article was published first at Remove Costmin Pop-Up Ads & Advertisements
Article Link: https://www.bleepingcomputer.com/virus-removal/remove-costmin-popup-ads-and-advertisements