I hate to piss Unne off, but Windows runs perfectly fine for me cause I'm not an idiot. I don't open attachments and junk in Thunderbird. Plus, I use Firefox.

Anyway, yeah, Windows if full of vulnerabilities. They have been exposed because it runs on 90% of machines in the world (or something like that). Thus, if someone is gonna make a virus, they probably want to target it at 90% of the world instead of 10%. Perhaps is Linux or OS 10 was on 90% of machines we'd see more vulnerabilities.