I don't open ANYTHING from ANYONE I don't recognize. Sometimes my curiosity really bugs me to see what it is that's being sent. But I've been careful and so far, my computer hasn't crashed or caught a virus. If it's someone I know but don't recognize the name, and it's that important, they'll ask me if I got their e-mail. They can always send it again.

I'd send the e-mail to Yahoo and ask them if they've sent it. They will confirm whether they did or not. In the meantime, I'd delete it. MOST computers already have an anti-virus program in it you can run.

Just keep saying to yourself..."Curiosity crashed the computer, curiosity crashed the computer"