The document discusses a browser hijacker called dosearches hijacker that changes users' browser home pages and search providers without permission in order to generate profit. It infects browsers like Internet Explorer, Firefox, and Chrome. The hijacker exposes vulnerabilities in the system and users' search histories. The document provides instructions for manually removing the hijacker from browsers by changing browser settings and removing the unauthorized search provider. It recommends installing security software to prevent future malware infections like browser hijackers.