Sue went to a website to watch Bob Dylan live on stage and her computer got "fried." Leo says that there's no website that can short out a computer. And it's not in the interest of a hacker to be that destructive. They want vulnerable computers to exploit them. So it's important to keep the computer updated. She should also update Flash, her PDF reader, drivers, and just about everything can be exploited. Leo also recommends using Google Chrome, because it sandboxes Flash and updates it all the time. So she doesn't even have to install Flash on her system.
Leo thinks that more likely what happened is that the hardware was on its last legs and when she accessed the high definition video, the hard drive just failed.