Because windows isn't 100% user friendly and it's 100% insecure. This is why.I would never waste time with micromanaging stuff like scans.
And I had to be exceptionally stupid, to get to where I am now. I wanted to play with the new Walking Dead game and the next thing I knew was downloading "150% legit crack" from a Russian site, and then EXTRACTING the .rar and then OPENING the .exe.
For 2,5 years I had no problems, despite only having Windows Firewall.
I honestly don't know why I would switch to Mac or Linux, even if they were accessible with everything. Windows is very user friendly, I am using it since I was ~8, and I have no complaints. Win 95 was fucking terrible, but 98, XP and 7 were perfect for me so far. I am not sure though if I should upgrade to 10.
Just an example. Anytime that I switch to a new version of Linux, I don't need to reinstall programs, make copies of my system or my data, it all remains there. Which means that, as an example, after the new installation, when I open Firefox or chrome, they are exactly as I left them before installing the new os. Tell windows to do this.