Iiiu.xyz is a redirect virus that attacks Google Chrome, Mozilla Firefox and other browsers. Searchgg Custom Search is the alternative name for this hijacker. It amends the default search engine parameters of the aforesaid browsers and causes many troubles for the users. Instead of the relevant data, they keep encountering plenty of third-party websites that are extremely dangerous and can eventually infect the system with many malicous applications, for example, fake system optimization tools, rogue security apps and so on. We recommend you to carefully follow this guide explaning how to fix your system in an automatic or manual manner.