This morning I woke up my monitors and noticed that there was a skype message on my screen from a user named "Security Center". It was a Virus Propagation attempt. It read...

WINDOWS REQUIRES IMMEDIATE ATTENTION
=============================

ATTENTION ! Security Center has detected
malware on your computer !

Affected Software:

Microsoft Windows NT Workstation
Microsoft Windows NT Server 4.0
Microsoft Windows 2000
Microsoft Windows XP
Microsoft Windows Win98
Microsoft Windows Server 2003

Impact of Vulnerability: Remote Code Execution / Virus Infection /
Unexpected shutdowns

Recommendation: Users running vulnerable version should install a repair
utility immediately

Your system IS affected, download the patch from the address below !
Failure to do so may result in severe computer malfunction.

[ ... Link Removed ... ]

Of course Microsoft NEVER sends out notices like this vie Email, MSN Messenger and certainly not through a third party application like Skype. If you got this, then just close the window and *NEVER CLICK THE LINK!*

Be proactive in protecting yourself. If it looks fishy, then it probably is. If you are concerned that you may need an update from Microsoft, then bring up MS Internet Explorer, Click Tools -> Windows Update and run the updater. It'll tell you if you need any valid downloads from Microsoft.

Unfortunately Skype doesn't have any means by which we users can report violations like this. Paypal at least has an email address "spoof@Paypal.com" to report spoof emails, but apparantly Skype doesn't care about criminals using their service to spread this type of malware.

Here's a screenshot. I used the pasted text instead of the screenshot earlier in order to trigger the Googlebots.