Your pretty naive aren't you. Microsoft has still been sending out XP updates since they realized lots of business' still use the software. If your not a moron, run a good anti-virus and maleware program its fine.
Ouch. But, anyway, what you say is true: the best defense against viruses and attacks is common sense. I'll be totally honest, the laptop I'm on right now doesn't actually have any antivirus or security software on it whatsoever. Haven't for a while, hasn't been a problem at all.
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