Forum posts for csrss.exe

What does the csrss.exe process do?

What is the purpose of the csrss.exe (Client/Server Runtime Server Subsystem) on Windows?

Maybe someone could give a good explanation or pointers to documentation? Unfortunately Google results are pretty noisy when searching a core process of Windows.

The reason I'm asking is that I got a BSOD from my service application which seems to be related to the csrss.exe process, at least this is what the analysis of the memory dump shows:

PROCESS_OBJECT: 85eeeb70

IMAGE_NAME: csrss.exe

DEBUG_FLR_IMAGE_TIMESTAMP: 0
MODULE_NAME: csrss
FAULTING_MODULE: 00000000
PROCESS_NAME: PreviewService.
BUGCHECK_STR: 0xF4_PreviewService.
DEFAULT_BUCKET_ID: DRIVER_FAULT
CURRENT_IRQL: 0
LAST_CONTROL_TRANSFER: from 80998221 to 80876b40

STACK_TEXT:
f5175d00 80998221 000000f4 00000003 85eeeb70 nt!KeBugCheckEx+0x1b
f5175d24 8095b1be 8095b1fa 85eeeb70 85eeecd4 nt!PspCatchCriticalBreak+0x75
f5175d54 8082350b 00000494 ffffffff 051bf114 nt!NtTerminateProcess+0x7a
f5175d54 7c8285ec 00000494 ffffffff 051bf114 nt!KiFastCallEntry+0xf8
051bf114 00000000 00000000 00000000 00000000 ntdll!KiFastSystemCallRet

STACK_COMMAND: kb
FOLLOWUP_NAME: MachineOwner
FAILURE_BUCKET_ID: 0xF4_PreviewService._IMAGE_csrss.exe
BUCKET_ID: 0xF4_PreviewService._IMAGE_csrss.exe

Followup: MachineOwner


EDIT: Thanks already for the good answers, but I actually don't need help concerning my service, I just would like to get some basic understanding of what the purpose of this service is.

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