It does not have to be a virus to be dangerous ... read up... & update security always..
not** There are programs out there that claim to help but in fact are loaded up with spyware, viruses, trogans etc.. DOn;t think spyware is harmless it runs in the background and sucks up alot of ram (memory speed & space) usually causing more computer crashes.. DOn;t download anything from "Pureity" claims to do a wonderful job. Note most companies legit do not spam you & only send info if you request. that isn't all security & cleaning related but most. Also those using Norton anyting.. If you get an email that says norton , anti virus , works or something like that. Youcan check with symatic to see if these people are legit. Some are just bootleggers others just have nothing better to do but to see if they can slip a fast one.