protecting your computer from viruses

Anyone with a home computer knows better than to leave his/her computer unprotected against viruses, Trojans, and other assorted malware. They make your computer run slowly, they corrupt your files, they flood your inbox with spam, and so on and so on. For as long as there have been home computers, there have been computer viruses. If you've been keeping up with Apple, you may remember some years ago when Steve Jobs was selling Macs on the basis that Mac users don't ever need to worry about viruses. Great sales pitch, to be sure, but more recently, Steve Jobs has sheepishly admitted that "Mac users may want to invest in some anti-virus software, after all."