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}}</ref> Window manager and [[Graphics Device Interface|GDI]] services are handled by a kernel mode driver (win32k.sys) instead.<ref>{{cite book|last=Russinovich|first=Mark|title=Windows Internals, 5th Edition|year=2009|publisher=Microsoft Press|pages=54}}</ref>
CSRSS is called along with <tt>winlogon.exe</tt> at Windows start-up. If either of the files is corrupted or otherwise inaccessible, the NT kernel will shut down the start-up process with a [[Blue Screen of Death]]. This is caused by a failure to move out of kernel mode and into user mode, the "normal" operation of Windows. The error code for this fault is 0xc000021a (STATUS_SYSTEM_PROCESS_TERMINATED).
In Windows 7 and later, instead of drawing console windows itself, CSRSS spawns <tt>conhost.exe</tt> subprocesses to draw console windows for command line programs with the permissions of that user.
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