I have been writing Windows device drivers for more than 20 years. Having had access to the Windows source code for almost 20 years, I have deep knowledge on almost every part of the Windows operating system – far beyond what anyone outside of Microsoft could ever achieve. This comprehensive knowledge is the reason Microsoft chose me as one of the principal authors of the seventh edition of their Windows Internals book, and why for 15 years Microsoft has paid me to train their own developers and support personnel on driver development (all driver models: KMDF, UMDF, Video, Network (NDIS miniports, light-weight filters, protocols (TDI), and intermediate drivers), Storport, file system, WDM (bus drivers, bus filters, function drivers, and function filters), Audio, Kernel streaming, etc.), Windows internals, driver debugging, and Windows security internals.