I feel pretty confident with recognizing Phishing attempts by email but this is new to me and was received via Skype. Do you think this is legitimate? I am thinking it's not.
Sue
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WINDOWS REQUIRES IMMEDIATE ATTENTION
=============================

ATTENTION ! Security Center has detected
malware on your computer !

Affected Software:

Microsoft Windows Vista
Microsoft Windows XP
Microsoft Windows 2000
Microsoft Windows NT Server 4.0
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.

System Scan - PLEASE WAIT - Scan in progress