I got the one from the KCRiders Egroup but thought it was legit. It showed "Virus detected and removed", but our Email is set up to remove any .exe files regardless. Since screensavers are often .exe's I just thought I was missing out on a cool screensaver. Lucky me!
My firewall automatically quarantines any .exe or .ini attachments, a very handy feature. It makes you aware that you have received a potentially dangerous file, allowing you to scan it while it is in quarantine.