Google didn't back up the list of my installed apps (I even logged into Market and verified after I had done a factory reset), so after I did a factory reset, I really had to start from scratch.
Even if it did back up the list of apps, it doesn't restore properly:
http://code.google.com/p/android/issues/detail?id=17354
I use Norton Internet Security (a couple of years now), and it has caught some serious issues on my PC a couple of times.
Antivirus software on a PC is like insurance. Not everybody wants it, until something bad happens. I suppose there are people out there who have never needed to make an insurance claim, and feel insurance is utterly useless.
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