Sysinternals Freeware - Mark Russinovich & Bryce Cogswell

About Us

Everything on this site is written by Mark Russinovich and Bryce Cogswell alone. There is no anonymous team of programmers or writers behind Sysinternals. While we make every effort to respond to your comments and suggestions about Sysinternals tools, in general we're unable to provide programming advice or general technical support through this site, and we do not make product recommendations or provide pointers to third-party products.

Mark Russinovich (Mark's Blog)

Mark Russinovich is Chief Software Architect and co-founder of Winternals Software (, a company that specializes in advanced systems software for Microsoft Windows. Mark is coauthor of Inside Windows 2000, Third Edition (Microsoft Press) with David Solomon and the Fourth Edition, entitled Windows Internals. He and David Solomon also deliver public and private seminars on Windows operating system internals and advanced troubleshooting to numerous companies and organizations, including regular deliveries to Microsoft. They also created a 12 hour self-paced Windows internals video tutorial that Microsoft has licensed for worldwide corporate use.

Mark is a Microsoft Most Valuable Professional (MVP) and serves as senior contributing editor for Windows IT Pro magazine where he writes for the Windows Power Tools column. He is also a frequent speaker at major industry conferences such as Microsoft Tech Ed, IT Forum, Windows IT Pro Magazine's Connections and Redmond Magazine's TechMentor.

Mark has a B.S. from Carnegie Mellon University and a M.S. from Rensselaer Polytechnic Institute, both in computer engineering. In 1994, he earned a Ph.D. from Carnegie Mellon University, also in computer engineering. After working briefly at NuMega Technologies (now Compuware NuMega Laboratories), Mark worked for two and a half years at IBM's Thomas J. Watson Research Center in New York, where he participated in the research and development of kernel-mode Web server-accelerator technologies. He can be reached at [email protected].

Bryce Cogswell

Bryce also earned a Ph.D. from Carnegie Mellon. His thesis was on timing-independent binary-to-binary translation. He is co-founder and Chief Technical Officer of Winternals Software in Austin, Texas. Bryce can be reached at [email protected].