Whatever you do, keep away from clicking any links in the message - be it Unsubscribe or whatever.
A relative of mine got sent a self-activating virus that first opened as a desktop icon, bright yellow banner with SEX written in large, bold type black right across it.
At this point he panicked and right-clicked and deleted the offending icon before his Missus saw it , and Bingo! - the viral package opened, spread right across his system, hijacked his browser and probably set him onto a bot-net. Every time he tried to activate his Antivirus the machine crashed.
It came to me in the end, the machine that is, and I just put in a new hard drive and installed Windows on it. I did take a look beforehand, not connected to the web, and managed to run Hijack this! using a CDR, but there was masses of rubbish everywhere. Fortunately he had backed up his data before the whole thing went off, so he had learnt something from me.
Shit like this, there's only one option for it - Delete
B