You buy a new computer, connect in to the internet and
proceed to download your choice of ant-virus software,
firewall, and possibly other security-enhancing stuff.
But in the half-hour or more it takes to do all that, your pc is
wide open, and with the frequency of probing attacks these
days, a variety of undesirable agents could be installed and
hidden before the anti-malware gets going.
So why don't computer retailers offer machines with anti-malware
stuff already installed ?

Jim Hawkins