WinFixer, WinAntiVirus, WinAntiVirusPro, ErrorSafe, SystemDoctor, WinAntiSpyware, AVSystemCare, WinAntiSpy, XPAntivirus2008, Performance Optimizer, StorageProtector, PrivacyProtector, WinReanimator an others are very similar computer programs available only for Microsoft Windows that claim to repair computer system problems , but do not actually do so. They are sometimes installed without the user's consent, usually through Internet Explorer. They display false information about the user's computer, confusing the user into believing that their PC is infected with viruses, spyware and/or other forms of malware. The advertisements pop up a display with notifications to convince the user that something may be amiss with the computer, or run a fake diagnostic. The program repeatedly prompts the user to purchase a licensed copy of the program. Due to these problems, WinFixer and its sister applications are generally considered scareware spyware through misleading popups and forced downloads.