Robert wants to know if it's possible to get a virus with read only media. He wants a computer for online banking that can't be written to. Leo says that's an interesting idea. The ideal solution here would be a Chromebook. They're cheap, there are no viruses, and it comes with a power wash feature that brings it right back to the way it was when he first got it. Couple that with second factor authentication, and he'll be golden. He could also boot from the CD drive and that would prevent anything from being written to it.