Windows NT Session Manager

smss.exe. What is it?

Smss.exe is the Windows Session Manager SubSystem in Windows 2000/XP/2003/Vista/7. This file is part of Microsoft Windows Operating System. Smss.exe is developed by Microsoft Corporation. It’s a system and hidden file. Smss.exe is usually located in the %SYSTEM% sub-folder and its usual size is 81,920 bytes.

Smss.exe is responsible for handling user sessions on your system by starting the system thread and other critical tasks. The smss.exe process is responsible for launching winlogon.exe and csrss.exe processes, and setting system variables. After winlogon.exe and csrss.exe have been launched, smss.exe waits until they end. If there are no errors, the system shuts down normally. However, if Winlogon or Csrss end unexpectedly, the smss.exe process makes the system hang and stop responding.

Important: Smss.exe should be located in the C:\Windows\System32 folder. If you find it anywhere else, it could be a virus, trojan, or worm. Scan your computer with Auslogics Antivirus to make sure it's not infected.


The smss.exe process is important for system stability and should not be terminated, because programs on your computer need it to work correctly.


Author: Microsoft CorporationPart Of: Microsoft® Windows® Operating SystemCommon path(s): subfolder %SYSTEM%
subfolder %WINDOWS%


Malware risk: Scan your PC for viruses and Trojans
Some viruses infect computers while disguised in the form of legitimate files, like smss.exe. Run an antivirus scan to ensure your PC is clean and safe.
Registry Errors: Free scan (run Registry Cleaner)Uninstallation: N/A Uninstall (run Unistall Manager)Disk & Memory Usage: N/A Free scan (run Task Manager)

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smss.exe has the following rating: 5.0
based on 2 user opinions.
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by rizagie r guntinaz on Mar 28, 2012 at 01:18 AM

remove unlock file

2 | 0
by Me on Feb 15, 2010 at 11:47 AM

This is an essential Windows file that shouldn't be terminated. However watch out for viruses that use the same file name, but are located in a different folder!

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