I think a better option would be mandatory training before being allowed to use a computer. Just like we certify you to be able to drive, you should be technically competent enough to use a computer. Taking the driving metaphor further, the gov't could enforce the use of security products to protect yourself much like we enforce the use of seat belts here in the US. We don't force you to wear seatbelts but if you're caught without one you get a ticket. No antivirus and running Windows? That'll be a ticket and a fine. Oh yes, I said "fine". Never underestimate the governments willingness to "tax" it's citizens.