Don't want trojans and viruses? Switch to a Mac
We are not campaigning for Mac's, but according to this report from anti-virus company Sophos, "Malware statistics suggest it is time for home users to switch to Macs", and they go on to say "the continued dominance of Windows-based threats has prompted Sophos to suggest that many home users should consider switching to Apple Macs, to shield themselves from the malware onslaught."
But, then if you have been using a Mac, you already knew that didn't you? :)