0wn3d in 200 seconds. Windows XP security on the net
 

While the XP SP1 machine averaged 341 attacks per hour, the number dropped to just 3.4 per hour for a machine running Service Pack 2. SP2 ships with the built-in Windows firewall turned on by default. A Linux box averaged 1.9 attacks per hour.

http://www.theregister.co.uk/2004/12/01/honeypot_test/