Craig Mundie, who oversees the company's Trustworthy Computing initiative, told an audience Wednesday that in response to the threat of terrorist cyberattacks, Microsoft would deploy security fixes to its installed base of hundreds of millions of computers worldwide in the coming year -- even if those fixes break applications in use by customers.

"We're going to tell people that even if it means we're going to break some of your apps, we're going to make these things more secure. You're just going to have to go back & fix it," said Mundie in a public presentation at the company's Silicon Valley campus in Mountain View, California.

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