I understand your frustration, I pretty geeky and I spend several hours a week keeping my
PC clean and safe. I am now VERY reluctantly setting up an email
PC for the office and I've seriously considered a Mac for that.
If you decide to stay with a
PC, I can suggest ways to help keep it clean. (I do know a lot about that subject.

) I'm not a Mac expert and I do know that they can be infected as well, it's just a lot less common so the odds are in your favor.