HPRewriter2 is a browser hijacker. Malwarebytes Anti-Malware can detect and remove this potentially unwanted program. The hijacker alters the shortcuts for Chrome, Opera, Internet Explorer, Yandex, and FireFox. The full version of the full version would have protected you against the hijacker. It would have warned you before the application could install itself, giving you a chance to stop it before it became too late. We hope our application and this guide have helped you eradicate this hijacker, we say.”]
Source: https://forums.malwarebytes.com/topic/187128-removal-instructions-for-hprewriter2/