Windows 7: Windows 7 security primer.

Malicious Trojans continue to plague end-users' desktops, yet most machines aren't exploited due to missing patches (although this is the second biggest cause), unpatched zero days (almost never a factor), drive-by downloads, or misconfigurations. Nope, most systems are infected because users are duped into intentionally installing programs that Web sites say they need. These socially engineered Trojans come in the guise of anti-virus scanners, needed codecs for a media player, fake patches, and just about any other bait the bad guys can concoct to lure end-users into installing their Trojan file.