 Emwin, ABC News, Washington. Microsoft says the man at the top is keeping a close eye on today's situation after an apparent bad patch from a cybersecurity company knocked out computers running Microsoft Windows around the world. A patch from CrowdStrike causing machines to crash. And since security software like this runs at what's known at the kernel level, the fix could at times be really complex and time-consuming. And Johnson is the corporate VP and deputy CISO at Microsoft.