The only virus I ever got came pre-installed on a computer I bought from a mom and pop computer store (and no, I'm not talking about windows
).
Since I had never downloaded or installed anything and it was crashing and acting up right from the start I assumed that I got flawed hardware and began replacing everything on the system. After two weeks I finally decided to run a virus scan and figured it out. The store apologised but I never bought anything from them again.