MS actually moved the GUI stack into the kernel around NT 4. Used to be (so lege... | Hacker News

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		e12e on April 16, 2015 \| parent \| context \| favorite \| on: Remote Kernel Code Execution Via HTTP Request In I... MS actually moved the GUI stack into the kernel around NT 4. Used to be (so legend has it) if the video driver crashed on earlier versions of NT, you could restart it, and the system didn't go down. But, you know, PERFORMANCE!!1. Win.

yuhong on April 17, 2015 [–]

I think they eventually separated out part of the video driver into user mode with WDDM and introduced TDR.

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