The Plus HD virus (also found as PlusHD virus, Plus-HD pop-ups, Ads by Plus-HD, Plus-HD-4.7, Plus-HD-4.9, Plus HD Services, or simply the Plus-HD virus, etc.; though not technically a computer virus) is potential malware categorized as adware, a browser hijacker, and spyware that installs to a Microsoft Windows computer system and attaches to Google Chrome, Mozilla Firefox, and Microsoft Internet Explorer as an advertisement supported browser add-on, browser helper object (BHO), and extension with or without user consent. Plus-HD software primarily bundles with third-party items and other potential malware that may cause further complications.