Computer infected, Firefox, antivirus xp 2008 Xubuntu, Linux?

Antivirus XP 2008 is a suspect anti-spyware application that have a set of features which do not work, and produces false positives which may goad the user into purchasing the application. Antivirus XP 2008 show various pop-up advertisements and fake security messages, which may disturb your work and slow down computer performance. Antivirus XP 2008 is a clone of XP Antivirus fake antispyware. It is recomended to remove Antivirus XP 2008 from your computer.