Hardly paranoia, haven't you been infected just this week?
Yes, first time in a loooong time. It happens, I didn't say different. But I enjoy my PC without the loss of control. Anyone who spends any reasonable amount of time on the net is eventually gonna see a problem here and there.
That's why we have backups and such.
I enjoy my PC. If I have to worry all the time about everything it wouldn't be enjoyable.
I like to try betas, even beta OSes. I like experimenting and trying new things. I run about 6 OSes just because I can. That is the reason I own a PC, it's a toy, meant to be enjoyed, not worried over.
As I said, YMMV. Not everyone sees things the way I do, I'm just stating what I think about this topic.
Internet Security is an oxymoron. If you're connected to the internet, you are not 100% secure, no matter who you are, or what you do.
If that worries you, disconnect, and be safe.