MARK RUSSINOVICH works at Microsoft as a Technical Fellow, Microsoft’s senior-most technical position. A cofounder of Winternals, he joined Microsoft when the company was acquired in 2006. He is author of the novels Zero Day and Trojan Horse, the popular Sysinternals tools, coauthor of the Windows Internals book series, a contributing editor for TechNet Magazine, and a senior contributing editor for Windows IT Pro Magazine. He lives in Washington State.