A Blast From Windows Past?

I hope we're not seeing the re-emergence of a dangerous trend here.....



.....Found this sitting on my desktop. Does this look familiar (but only with a slightly different protocol)?

Reminds of when spammers could use a loophole found in MSN Messenger to send spam right to an end user's desktop.

However, just to be safe...Do any of you geeks out there want to tell me just what this really is, just in case it might be something legitimate? If you do, just drop me a line using the comments section.