This is how I always deal with my computer and never gave me any virus, malware or whatever, without the need for a bloated unnecessary virus scanner on my computer.
Of course, an alternative approach is to use a non-bloated virus scanner and forget all that faffing about with internet cable nonsense!
I use Eset Nod -- a very non-bloated and efficient virus scanner. My machine is connected to the big bad outside world 24/7, and I have virtually no problems with virus and malware. In fact the only time I have in the last five years or so came from someone else's memory stick, and it was detected and dealt with instantly!
Keep the OS up to date, use good virus protection and keep it updated, have a good internet router with proper firewall configurations, and avoid surfing dodgy websites or downloading dodgy files. And finally, keep all your critical data backed up in at least three independent places, and maintain images of the OS drive. That way if the evil monster does find a way in, you can flatten the system, restore the image, and be up and running as if nothing had happened inside an hour or two.
Technical Editor, Sound On Sound