I've just installed avast, previously used EZ antivirus (paid for updates). It does alert you to a virus with a notification window just above task bar, and gives you the option of p[utting it in the chest out of harms way. From there you can delete it. It's not the easiest piece of software to configure. Lots of difeerent windows accessible fronm the icon in the system tray. It does however update itself, and seems pretty easy to use, once set up. You'll need to read the help files to get the most from it. I'm sure more experienced users will be able to9 teach us both a bit more about this program, but it seems OK to me.
I've turned off the sounds though, as you get an irritating American accent that tells you when an update has been received or if a virus has been caught!