Craig Timberg and Ellen Nakashima
March 17, 2014
Federal officials have known for more than six years that Microsoft will withdraw its free support for Windows XP on April 8, 2014. Despite a recent rush to complete upgrades, an estimated 10 percent of government computers — out of several million — will still be running the operating system on that date, company officials said.
That includes thousands of computers on classified military and diplomatic networks, U.S. officials said. Such networks have stronger defenses generally but hold more sensitive material, raising the stakes for breaches if they occur.