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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 32-bit program executes with the privileges as the currently logged in user account. csrss.exe is executed by the process smss.exe (Menedżer sesji Windows NT by Microsoft).


What is the community is seeing?What is the community is doing?
About 0.1% of all Boost users have the csrss.exe process running.Of the 0.1% of csrss.exe users, less than 1% have disabled it.
How resource intensive is csrss.exe?
Comparison based on the average resource utilization across all programs.
0.00283% CPU28287.4%
Average CPU utilization across all programs is 0.00001%.
     1.66 MB RAM7.7%
Average private memory utilization across all programs is 21.53 MB.
849 /min37.7%
Average I/O read and write operations for all programs is 2,253 per minute.
59 GDI objects39.3%
Average number of GUI GDI and USER objects for all programs is 150.
454 context switches/sec454.0%
Average context switches for all programs is 100 per second.
Typical file (disk image) location:

Are there other versions of Client Server Runtime Process?

What else is related?

What Windows OS versions does this run on?

Microsoft Windows XP (5.1.2600.196608)

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: 5.1.2600.5512 (xpsp.080413-2111)
Product version: 5.1.2600.5512
Size: 6 KB
Original file name: CSRSS.Exe
Windows file protection: Yes

Resource utilization

CPU utilization averages
Total CPU: 0.0031596504%
Privileged CPU: 0.0003309093%
User CPU: 0.00282874107679%
Privileged CPU time: 180546875 ms
Privileged CPU time /min: 350,824 ms
Context switches /sec: 454
Memory utilization averages
Committed memory: 26.23 MB
Peak committed memory: 32.11 MB
Paged memory: 1.66 MB
Peak paged memory: 3.51 MB
Paged system memory: 56.86 KB
Non-paged system memory: 5.93 KB
Working set memory: 3.83 MB
Peak working set memory: 5.44 MB
Min working set memory: 3.45 MB
Private memory: 1.66 MB
Page faults: 292,187
Page faults /min: 568
Process I/O averages
Total read operations: 437,059
Read operations /min: 849
Total read transfer: 14.87 MB
Read transfer /min: 29.58 KB
Total other operations: 649,944
Other operations /min: 1,263
Total other transfer: 1.4 MB
Other Transfer /min: 2.8 KB
GUI Object Averages
GDI objects: 59
USER objects: 62
Handle count average: 682
Thread count average: 13

Process details

Runs as (owner): User
Integrety level: Undefined
Windows platform: 32-bit
Parent Process
Process Command
C:\WINDOWS\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,3072,512 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrC:UserServerDllInitialization,3 ServerDll=winsrC:ConServerDllInitialization,2 ProfileControl=Off MaxRequestThreads=16

Image hashes

MD5: a414ed40e29d86c275d8ea66944886f6
SHA-1: da0b21515649beb7f4396358a4bebc49420cf7c5

PE image details

Subsystem: Native (none required)
File entropy: 4.57027
File packed: No
Import Table
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