Seriously...I discarded 12 months of new subscription when it [Norton] actually destroyed 'bits' necessitating a re-install of SP2.
Since then it's been AVG [freeware]...but have been looking into paying for something that actually WORKS...and more often than not it's 'BitDefender' that gets the good write-ups.
There's a free ver, much like the free AVG [it seems]...but the purchased one isn't expensive anyway. I'm currently using the online scanner....and it's having fun...found itself a nasty in the pst ...slow as a wet week...looks like 70 minutes for my 'C' drive [20gig].
Full ver is a 30 day trial anyway...so looks like I'll go 'that way'...