What is lsm.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the lsm.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Lsm.exe file information

Windows Task Manager with lsm
Lsm.exe process in Windows Task Manager

The process known as Local Session Manager Service or Lokaler Sitzungs-Manager-Dienst or anacondas inactivation imaginative belongs to software Microsoft Windows Operating System or servile or Betriebssystem Microsoft Windows by Microsoft ( or hippish intromitted.

Description: The original lsm.exe from Microsoft is an important part of Windows, but often causes problems. Lsm.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 267,776 bytes (41% of all occurrences), 229,888 bytes and 4 more variants. 
The file is a Windows core system file. The program is not visible. Lsm.exe is a Microsoft signed file. Therefore the technical security rating is 3% dangerous, however you should also read the user reviews.

Recommended: Identify lsm.exe related errors

Viruses with the same file name

Is lsm.exe a virus? No, it is not. The true lsm.exe file is a safe Microsoft Windows system process, called "Local Session Manager Service". However, writers of malware programs, such as viruses, worms, and Trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are for instance or Worm.Win32.VBNA.b (detected by Kaspersky), and Backdoor:Win32/Votwup.B or Backdoor:Win32/Slingup.A (detected by Microsoft).
To ensure that no rogue lsm.exe is running on your PC, click here to run a Free Malware Scan.

How to recognize suspicious variants?

Important: Some malware disguises itself as lsm.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the lsm.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

dears , Be careful , the Original file lsm.exe small (L) the fake file Ism.exe capital (i)
  Abdullah Alghamdi  
It crashed my pc!!!!!!
im no expert by far.. but i do like to learn.. from what i can tell its an authorization program that, if running correctly is fine.. However, if you see this C:\Users\your_name\AppData\Roaming\lsm.exe -- bad.. so its known to have clone virii
Critical Win7 file. Ism.exe 32* isn't.
lsm is supposed to reside within the Windows folder. If you find it outside that ( a user profile), that's something masquerading as the real lsm
  anon user  
I found it in appdata/roaming i deleted it and my computer works fine
  Jacob Collins  
It has very bad memory leaks but a way to fix it sort of is by going to task manager and right clicking lsm.exe and change affinity and change it so it only uses 1 so it takes less processing power, All though it will not fix any ram problems it gives, And also DO NOT DELETE IT.
This virus was named after the critical file on Windows, but was placed in AppData instead of System32. I noticed it had been running at startup, but my pc was too fast to be able to see the little line of text when it came by. This is a trojan hidden Bitcoin miner, as wierd as it sounds. GET RID OF IT GOOD LORD. Make sure it's in AppData though. If you delete the System32 one, you're screwed.
  Evan Klug  
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of lsm.exe: based on 67 votes with 9 reviews. 36 users think lsm.exe is essential for Windows or an installed application. 5 users think it's probably harmless. 11 users think it's neither essential nor dangerous. 4 users suspect danger. 11 users think lsm.exe is dangerous and recommend removing it. 3 users don't grade lsm.exe ("not sure about it").

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Best practices for resolving lsm issues

A clean and tidy computer is the key requirement for avoiding problems with lsm. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the lsm.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

lsm.exe [all]