This document applies to HP and Compaq computers with Windows 7, Vista, and XP.
This document explains differences between viruses, helps in removing viruses, and offers suggestions for preventing future viruses.
caution:Never open an attachment or a link in an email when you do not trust the sender. Sometimes a person intending to do harm sends an email message that appears to be from a trusted source, such as Microsoft. Most trusted companies do not attach software to email. If you do not trust an email, research it on the Internet or contact the company or sender named in the email.
note:This document is not about spyware, adware, or browser hijacking. Spyware might make the computer slow when connecting to the Internet and the computer might function as if it has a virus, but this is not discussed further in this document. For more information about spyware, adware, or browser hijacking, see HP PCs - Computer Might Be Infected by a Virus or Malware (Windows 10, 8).
note:HP SmartFriend is a support service that can help you strengthen security and resolve vulnerabilities on your computer. For more information, see HP SmartFriend (in English).