This blog post is generally aimed at people who still use only Microsoft Operating systems (e.g. XP, Vista, Win98) etc. and shows you why Linux is a good alternative
Read it here
1. Its safer: Right now, thousands of people are busy writing viruses, trojans, spyware, and malware aimed specifically at people who use Microsoft Operating systems. i.e. You. As if thats not bad enough, millions of compromised machines (bots) are busy trying to hack and replicate into Microsoft PCs (like your PC). By switching to Ubuntu (or any Linux) you are removing this target off your head, and removing 99% of the threats your PC faces.