I use windows as that is all i have ever used so i feel comfortable. It is only unsecure as it so popular. If more people used Mac instead of windows that would be more targeted so would be more unsecure. Most of the people who make viruses and stuff aim for it to affect windows as more people use it.
I've tried linux before but it's harder to maintain and use. I found there are like updates for it almost every day which I guess is why it's a bit more secure. I couldn't last a week without there being a new update for at least one component of the system...
I want to get Linux, you can dual boost your PC so you have Windows and Linux installed, and it is generally a lot better. You get GIMP free with it (made by same people i think....) and also i love the look of beryl >>>> Beryl<<<<
I use windows,i think its just a force of habit.I cannot see myself ever using Linux or Mac,i dunno why,i think its just because im not used to them and i dont think i ever will be.