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What is csrss.exe?

Part of Client Server Runtime Process by Microsoft

What is it?

Client/Server Runtime Subsystem, or csrss.exe, is a component of the Microsoft Windows NT operating system that provides the user mode side of the Win32 subsystem and is included in Windows 2000, XP, 2003, Vista, Server 2008 and 7. Because most of the Win32 subsystem operations have been moved to kernel mode drivers, in Windows NT 4 and later CSRSS is mainly responsible for Win32 console handling and GUI shutdown.

What if I disable Client Server Runtime Process?

It is critical to system operation; therefore, terminating this process will result in system failure. Under normal circumstances, CSRSS cannot be terminated with the taskkill command or with Windows Task Manager, though it is possible in Vista if the Task Manager is run in Administrator mode. On Windows 7, Task Manager will inform the user that terminating the process will result in system failure, and prompt if they want to continue.
Description of csrss.exe from Microsoft
CSRSS runs as a user-mode system service. When a user-mode process calls a function involving console windows, process/thread creation, or Side-by-Side support, instead of issuing a system call, the Win32 libraries (kernel32.dll, user32.dll, gdi32.dll) send an inter-process call to the CSRSS process which does most of the actual work without compromising the kernel. Window manager and GDI services are handled by a kernel mode driver (win32k.sys) instead. The Windows NT 3.x series of releases had placed the Graphics Device Interface component in CSRSS, but this was moved into kernel mode with Windows NT 4.0 to improve graphics performance. The Windows startup process has changed significantly since Vista. 2 instances of csrss.exe are running in Windows 7 and Vista.
(csrss.exe is a system file that is installed with Windows)
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How does csrss.exe run?

Process - csrss.exe is an instance of a running program. This program executes under the SYSTEM account within Windows with extensive privileges on the local computer, and acts as the computer on the network. csrss.exe is executed by the process svchost.exe (Host Process for Windows Services by Microsoft).

How does csrss.exe start?

Scheduled task - csrss.exe is launched automatically by registering itself into the Windows Task Scheduler under the task name '\{1B908455-E233-4AF6-9EA8-FB47FE9E21E2}'. Task Scheduler provides the ability to schedule the launch of programs or scripts at pre-defined times or after specified time intervals or even with event-based triggers.


What is the community is seeing?What is the community is doing?
About 0.4% of all Boost users have the csrss.exe process running.Of the 0.4% of csrss.exe users, less than 1% have disabled it.
How stable is Client Server Runtime Process?
Based on crash data discovered by Boost, stability is a measure of how sound this particular process and the average percent of times it crashes.
Typical program1.26%
How resource intensive is csrss.exe?
Comparison based on the average resource utilization across all programs.
0.00259% CPU25925.2%
Average CPU utilization across all programs is 0.00001%.
          5.66 MB RAM26.3%
Average private memory utilization across all programs is 21.53 MB.
     136 /min6.0%
Average I/O read and write operations for all programs is 2,253 per minute.
166 GDI objects110.7%
Average number of GUI GDI and USER objects for all programs is 150.
112 context switches/sec112.0%
Average context switches for all programs is 100 per second.
Typical file (disk image) location:

Are there other versions of Client Server Runtime Process?

Why are multiple of the same versions listed?

What modules are loaded?

A module is a dynamic link library (DLL) or an executable file that is loaded into the process. Below is a list of non-system modules that are loaded by Client Server Runtime Process.

What else is related?

Client Server Runtime Process Stability

csrss.exe crashes or has encountered a critical error 0.8900% of the time.
Error: Stopped working (APPCRASH)
Crashing module: sxs.dll (still researching...)
Occurred: over 6 months ago

What Windows OS versions does this run on?

Windows 7 Enterprise (6.1.7600.0)
Windows 7 Home Premium (6.1.7600.0)
Windows 7 Professional (6.1.7600.0)
Windows 7 Ultimate (6.1.7600.0)
Windows 7 Ultimate N (6.1.7600.0)
Windows Seven Black Edition (6.1.7600.0)
Windows Vista (TM) Ultimate (6.1.7600.0)
Windows 7 Ultimate (6.1.7600.196608)
Windows 7 Home Premium (6.1.7601.65536)
Windows 7 Ultimate (6.1.7601.65536)
Microsoft Windows 7 Professional (6.1.7601.65536)
Microsoft Windows XP (6.1.7601.65536)

About Microsoft Corporation

Microsoft, founded in 1975 by Bill Gates and Paul Allen, is a veteran software company, best known for its Microsoft Windows operating system and the Microsoft More...
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File details

File name: csrss.exe
Publisher: Microsoft Corporation (verified)
Name: Client Server Runtime Process
Description: Microsoft® Windows® Operating System
Version: 6.1.7600.16385 (win7_rtm.090713-1255)
Product version: 6.1.7600.16385
Size: 7.5 KB
Original file name: CSRSS.Exe.MUI
Windows file protection: Yes

Resource utilization

CPU utilization averages
Total CPU: 0.0060897279%
Privileged CPU: 0.0034972036%
User CPU: 0.00259252432292%
Privileged CPU time: 59464545.91 ms
Privileged CPU time /min: 998 ms
CPU cycle count: 4,306,505
CPU cycle count /min: 187,918,505
Context switches /sec: 112
Memory utilization averages
Committed memory: 106.72 MB
Peak committed memory: 152.21 MB
Paged memory: 5.66 MB
Peak paged memory: 10.48 MB
Paged system memory: 259.09 KB
Non-paged system memory: 18.75 KB
Working set memory: 11.26 MB
Peak working set memory: 21.93 MB
Min working set memory: 6.83 MB
Private memory: 5.66 MB
Page faults: 99,853
Page faults /min: 60
Process I/O averages
Total read operations: 420,932
Read operations /min: 136
Total read transfer: 11.34 MB
Read transfer /min: 5.26 KB
Total other operations: 101,696
Other operations /min: 36
Total other transfer: 1.03 MB
Other Transfer /min: 510 Bytes
GUI Object Averages
GDI objects: 166
Peak GDI objects: 233
USER objects: 80
Peak USER objects: 86
Handle count average: 746
Thread count average: 11
Thread resource averages

Process details

Runs as (owner): System
Integrety level: System
Windows platform: 64-bit
Parent Process
Child Processes
Process Command
%SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrC:UserServerDllInitialization,3 ServerDll=winsrC:ConServerDllInitialization,2 ServerDll=sxssrv,4 ProfileControl=Off MaxRequestThreads=16

Scheduled task details

Name: \{1B908455-E233-4AF6-9EA8-FB47FE9E21E2}

Image hashes

MD5: 60c2862b4bf0fd9f582ef344c2b1ec72
SHA-1: 17542707a3d9fa13c569450fd978272ef7070a77
SHA-256: cb1c6018fc5c15483ac5bb96e5c2e2e115bb0c0e1314837d77201bab37e8c03a

PE image details

File entropy: 4.29124
File packed: No
Import Table
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