Should I block it?

No, this file is 100% safe to run.

VersionsAdditional versions

6.1.7600.16385 (win7_rtm.090713-1255) 18.75%
6.1.7600.16385 (win7_rtm.090713-1255) 62.50%
6.1.7600.16385 (win7_rtm.090713-1255) 6.25%
6.1.7600.16385 (win7_rtm.090713-1255) 12.50%
(Note, Microsoft publishes each variation of this file with the same version, but the hashes are unique.)

Relationships

Parent process
Related files

psxss.exe

Microsoft Windows Subsystem for UNIX-based Applications by Microsoft

Remove psxss.exe
Version:   6.1.7600.16385 (win7_rtm.090713-1255)
MD5:   799830b290332c188c9a951710856e51
SHA1:   f4a75add909972f27f3ac6950dfa355ada056412
SHA256:   221a28ab7928f16108bcc2cf101dfc797199d58df72831484ff63f2d1890ce66
This is a Windows system installed file with Windows File Protection (WFP) enabled.

Overview

psxss.exe executes as a process under the SYSTEM account with extensive privileges (the system and the administrator accounts have the same file privileges) typically within the context of its parent smss.exe (Windows Session Manager by Microsoft). The assembly utilizes the .NET run-time framework (which is required to be installed on the PC). This version is designed to run on Windows 7 and is compiled as a 32 bit program.

DetailsDetails

File name:psxss.exe
Publisher:Microsoft Corporation
Product name:Microsoft Windows Subsystem for UNIX-based Applications
Description:SUA Subsystem Server
Typical file path:C:\Windows\System32\psxss.exe
Original name:psxss.exe.mui
File version:6.1.7600.16385 (win7_rtm.090713-1255)
Product version:6.1.7600.16385
Size:641 KB (656,384 bytes)
Build date:7/14/2009 6:24 AM
Digital DNA
File packed:No
Code language:Microsoft Visual C# / Basic .NET
.NET CLR:Yes
.NET NGENed:No
More details

ResourcesResource utilization

(Note: statistics below are averages based on a minimum sample size of 200 unique participants)
Averages
 
CPU
Total CPU:0.00193904%
0.028634%
Kernel CPU:0.00131398%
0.013761%
User CPU:0.00062506%
0.014873%
Kernel CPU time:101 ms/min
100,923,805ms/min
CPU cycles:4,853/sec
17,470,203/sec
Memory
Private memory:2.39 MB
21.59 MB
Private (maximum):4.9 MB
Private (minimum):3.22 MB
Non-paged memory:2.39 MB
21.59 MB
Virtual memory:35.69 MB
140.96 MB
Virtual memory (peak):36.06 MB
169.69 MB
Working set:3.37 MB
18.61 MB
Working set (peak):4.91 MB
37.95 MB
Page faults:5,495/min
2,039/min
I/O
I/O write transfer:2 Bytes/sec
274.99 KB/min
I/O write operations:1/sec
227/min
I/O other transfer:0 Bytes/sec
448.09 KB/min
I/O other operations:1/sec
1,671/min
Resource allocations
Threads:18
12
Handles:817
600

BehaviorsProcess properties

Integrety level:System
Platform:32-bit
Command line:%systemroot%\system32\psxss.exe
Owner:SYSTEM
Parent process:smss.exe (Windows Session Manager by Microsoft)

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows 7 Ultimate 100.00%

Distribution by countryDistribution by country

United States installs about 25.00% of Microsoft Windows Subsystem for UNIX-based Applications.

OEM distributionDistribution by PC manufacturer

PC Manufacturerdistribution
Dell 42.11%
ASUS 21.05%
Acer 21.05%
Sahara 5.26%
GIGABYTE 5.26%
Hewlett-Packard 5.26%
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