By clicking on a link and connecting to a "poisoned" Web site, the employee inadvertently permitted the intruders to gain access to his (or her) personal computer and then to the computers of a critical group of software developers at Google's headquarters in Mountain View, Calif. Ultimately, the intruders were able to gain control of a software repository used by the development team.
Unless it's a flaw directly within the messenger software rather than the user who clicked the link...Microsoft wasn't really involved...
Wouldn't it be great if wars could be fought just by the assholes who started them?
"I don't believe in sweeping social change being manifested by one person, unless he has an atomic weapon." -- Howard Chaykin