I know lots of folks who use freebie anti-virus, etc programmes. At least once a year they each complain to me saying they had a worm/virus/trojan wipe them out.
I'll stick with my bought and paid for security
That said, I wonder if the original "Dr Solomon" chap still has no anti-virus software on his computer. He said he hadn't, in a computer mag interview a couple of years back. He said he just followed basic security rules.