Cltrkr.com is a very dangerous site that may repeatedly cause numerous browser redirection problems. These pop-ups may occur with Google Chrome, Mozilla Firefox, Internet Explorer and Microsoft Edge. Even Safari in Mac OS X is not an exception. By the way, these pop-ups are typically massive and produce an extremely negative impact on the way your computer operates, so please be careful not to interact with these many deceitful alerts! Instead, please carefully follow this tutorial below for more information on its removal.