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Rootkits: Subverting the Windows Kernel by James Butler, Greg Hoglund

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Chapter 2. Subverting the Kernel

 

There was no trace then of the horror which I had myself feltat this curt declaration; but his face showed rather the quiet and interested composure of the chemist who sees the crystals falling into position from his oversaturated solution.

 
 --THE VALLEY OF FEAR, SIR ARTHUR CONAN DOYLE

Computers of all shapes and sizes have software installed on them, and most computers have an operating system. The operating system is the core set of software programs that provide services to the other programs on the computer. Many operating systems multitask, allowing multiple programs to be run simultaneously.

Different computing devices can contain different operating systems. For instance, the most widely used operating system ...

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