That's one of the Netsky variants. Someone has the Netsky virus and reads the forums - they'd have to have your email address in a text file or something, because Netsky scans the hard drive for .txt / .doc / other random extensions for email addresses.

You're probably not the one with the virus, but I'd do a quick checkup to be sure.

Symantec's Netsky scanner/removal tool -
http://securityresponse.symantec.com...r/FxNetsky.exe