Hi MrAgent,
Probably you were saved by the bell, anyway that seems so. But rule one here is, and I am never loud but will make an exclusion once: NEVER OPEN UNSOLICITED MAILS. Once hurt will mean twice shy. And you are aware of the following proverb: "Curiosity killed the Operational System" to give the known proverb a twirl.
Do not open mails you know that are too good to be true, do not open attachments even if they promise you the moon, do not open an e-card or mail from a close friend (your friend could be infected). Do not open mails on interesting news events or promising naughty pics. Do not do this if you want your computer to be clean and not being turned into another zombie spamming machine or ridden with malware all sorts, because they are ready to invite some nasty friends once they have found their way into your system,
polonus