My parents run windows. Every month I had to clean some kind of malware. I finally got them to use firefox instead of IE so it goes about 6 months between malware infections now and thats mainly because my mother will still use bing/msn for something and one of the ads was smart enough to write their crap for more than one browser.
My mum used to be exactly the same, I ended up buying her a chromebox as all she was doing was browsing the web anyway. thats something like 4 years without incident now.
Personally I made the shift to Linux in 2009 after one too many blue screens from Vista and its worked out quicker and more reliable for me.
I'm glad... because now I spend most of my workdays upgrading or troubleshooting windows servers and desktops so its a breath of fresh air when I get home! :laughing: