Antivirus System pro appeared on my lower task bar and I cannot get the program removed. I downloaded instructions from another computer and the every time I try to complete a step, such as getting into task manager, it blocks the function and tells me there is a virus in that function. I basically cannot do anything without getting pop-up error messages saying I "cannot go there". The only thing it would allow me to do is purchase the software and perform a scan/removal. I did not do that. Help!