Should I block it?

No, this file is 100% safe to run.

Additional versions

6.2.9200.16384 (win8_rtm.120725-1247)	2.58%
6.2.9200.16384 (win8_rtm.120725-1247)	13.73%
6.2.8400.0 (winmain_win8rc.120518-1423)	0.07%
6.2.8400.0 (winmain_win8rc.120518-1423)	0.07%
6.2.8250.0 (winmain_win8beta.120217-1520)	0.02%
6.2.8102.0 (winmain_win8m3.110823-1455)	0.07%
6.1.7600.16385 (win7_rtm.090713-1255)	23.81%
6.1.7600.16385 (win7_rtm.090713-1255)	42.28%
6.0.6000.16386 (vista_rtm.061101-2205)	6.91%
6.0.6000.16386 (vista_rtm.061101-2205)	1.38%
6.0.6000.16386 (vista_rtm.061101-2205)	0.39%
5.2.3790.1830 (srv03_sp1_rtm.050324-1447)	0.05%
5.1.2600.5512 (xpsp.080413-2111)	5.37%
5.1.2600.5512 (xpsp.080413-2111)	0.41%
5.1.2600.5512 (xpsp.080413-2111)	0.30%
5.1.2600.5512 (xpsp.080413-2111)	0.05%
5.1.2600.5512 (xpsp.080413-2111)	0.28%
5.1.2600.5512 (xpsp.080413-2111)	0.02%
5.1.2600.5512 (xpsp.080413-2111)	0.02%
5.1.2600.5512 (xpsp.080413-2111)	0.18%
5.1.2600.5512 (xpsp.080413-2111)	0.05%
5.1.2600.5512 (xpsp.080413-2111)	0.02%
5.1.2600.5512 (xpsp.080413-2111)	0.09%
5.1.2600.5512 (xpsp.080413-2111)	0.14%
5.1.2600.5512 (xpsp.080413-2111)	0.14%
View more
5.1.2600.5512 (xpsp.080413-2111)	0.05%
5.1.2600.5512 (xpsp.080413-2111)	0.02%
5.1.2600.5512 (xpsp.080413-2111)	0.02%
5.1.2600.5512 (xpsp.080413-2111)	0.02%
5.1.2600.3311 (xpsp.080212-0005)	0.05%
5.1.2600.3300 (xpsp.080125-2028)	0.02%
5.1.2600.3244 (xpsp.071030-1537)	0.02%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	1.17%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.05%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.02%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.02%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.02%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.02%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.02%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)	0.02%

PE file structure

Show functions

Import table

csrsrv.dll

CsrUnhandledExceptionFilter, CsrServerInitialization

ntdll.dll

RtlSetHeapInformation, RtlSetProcessIsCritical, NtTerminateThread, NtSetInformationProcess, RtlSetUnhandledExceptionFilter, NtTerminateProcess, RtlFreeAnsiString, RtlAllocateHeap, isspace, RtlUnicodeStringToAnsiString, RtlNormalizeProcessParams, DbgBreakPoint, RtlUnhandledExceptionFilter, RtlUnwind, _aullshr

csrss.exe

Client Server Runtime Process by Microsoft

Remove csrss.exe

Version:	6.2.8102.0 (winmain_win8m3.110823-1455)
MD5:	5359ed3ca278904f3c76ca808b749ab5
SHA1:	17ebbebc35236a180b4ab5019f583702f1a498bc
SHA256:	1382e07cb5c15112d3324c7abcf5ecb8304dbdf51701bee5b9facc6b23d487a0

This is a Windows system installed file with Windows File Protection (WFP) enabled.

What is csrss.exe?

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.

About 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 W”

Details

File name:	csrss.exe
Publisher:	Microsoft Corporation
Product name:	Client Server Runtime Process
Description:	Microsoft® Windows® Operating System
Typical file path:	C:\Windows\System32\csrss.exe
Original name:	CSRSS.Exe.MUI
File version:	6.2.8102.0 (winmain_win8m3.110823-1455)
Product version:	6.2.8102.0
Size:	6 KB (6,144 bytes)
Build date:	8/24/2011 7:40 AM
Digital DNA
Entropy:	4.291245
File packed:	No
.NET CLR:	No

More details

Behaviors

Scheduled task

Entry path '\{1B908455-E233-4AF6-9EA8-FB47FE9E21E2}'

Resource utilization

(Note: statistics below are averages based on a minimum sample size of 200 unique participants)

Averages

CPU
Total CPU:	0.01160489%	0.028634%
Kernel CPU:	0.00970790%	0.013761%
User CPU:	0.00189699%	0.014873%
Kernel CPU time:	3,838 ms/min	100,923,805ms/min
Context switches:	67/sec	284/sec
Memory
Private memory:	1.53 MB	21.59 MB
Private (maximum):	10.19 MB
Private (minimum):	6.29 MB
Non-paged memory:	1.53 MB	21.59 MB
Virtual memory:	46.4 MB	140.96 MB
Virtual memory (peak):	68.91 MB	169.69 MB
Working set:	8.25 MB	18.61 MB
Working set (peak):	11 MB	37.95 MB
Resource allocations
Threads:	10	12
Handles:	290	600
GUI GDI count:	174	103
GUI GDI peak:	228	142
GUI USER count:	82	49
GUI USER peak:	84	71

Process properties

Integrety level:	System
Platform:	32-bit
Command line:	%systemroot%\system32\csrss.exe objectdirectory=\windows sharedsection=1024,12288,512 windows=on subsystemtype=windows serverdll=basesrv,1 serverdll=winsrC:userserverdllinitialization,3 serverdll=sxssrv,4 profilecontrol=off maxrequestthreads=16
Owner:	SYSTEM

Threads

Averages

ntdll.dll
Total CPU:	0.22428829%	0.272967%
Kernel CPU:	0.22428829%	0.107585%
User CPU:	0.00000000%	0.165382%
CPU cycles:	7,465,046/sec	5,741,424/sec
Context switches:	41/sec	79/sec
Memory:	1.36 MB	1.16 MB
winsrv.DLL
Total CPU:	0.00538586%
Kernel CPU:	0.00538586%
User CPU:	0.00000000%
CPU cycles:	546,423/sec
Context switches:	17/sec
Memory:	192 KB
CSRSRV.dll
Total CPU:	0.00343260%
Kernel CPU:	0.00216954%
User CPU:	0.00126306%
CPU cycles:	101,424/sec
Memory:	52 KB

Distribution by Windows OS

OS version	distribution
Windows 7 Home Premium	58.00%
Windows 7 Ultimate	23.00%
Windows 7 Professional	12.00%
Windows 7 Home Basic	5.00%
Windows Seven Black Edition	1.00%
Windows Vista Home Premium	1.00%

Distribution by country

United States installs about 49.49% of Client Server Runtime Process.

Distribution by PC manufacturer

PC Manufacturer	distribution
Dell	26.56%
Hewlett-Packard	19.14%
Acer	15.23%
ASUS	14.06%
Toshiba	12.50%
Sony	6.25%
Alienware	1.56%
Samsung	1.56%
GIGABYTE	1.56%
Lenovo	1.56%

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