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What does the lsass.exe file do?

The lsass.exe process is also known as LSA Shell (Export Version) or, as the case may be, Local Security Authority Process and is a part of Microsoft Windows Operating System or, as the case may be, IPSEC Services, Protected Storage, Security Accounts Manager. This software is produced by Microsoft (www.microsoft.com) or, as the case may be, noOrg (www.noorg.org). An obsolete or defective version of lsass.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about lsass.exe LSA Shell

lsass.exe is a Windows system file. Lsass.exe is found in the C:\Windows\System32 directory. Frequently occurring are file sizes such as 13,312 bytes (89% of all these files), 9,728 bytes as well as 11 other variants.
The program executes in the background, and can only be terminated using Windows Task Manager. The file has been digitally signed by Microsoft itself to guarantee its authenticity. This particular software is connected to a server on the Internet or in your local network. For this reason, 12% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

lsass.exe is a system file used by Microsoft Windows, and appears in Windows Task Manager as a process named "LSA Shell." However, some viruses or Trojans use the same file name in order to remain undetected (e.g. P2P-Worm.Win32.Agent.ajy or, as the case may be, Trojan-Dropper.Win32.Autoit.bfe (recognized by Kaspersky), as well as Trojan:Win32/Dursg.C or, as the case may be, Trojan:Win32/HistBoader.A (recognized by Microsoft)).
To be really safe, you should scan your computer with two different anti-virus engines. You can use a free Anti-Malware scanner for this purpose.

Objectionable files with the same file name have the following characteristics:

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves lsass.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about lsass?

it works depends and shut down the system at random
Altair
Microsoft Local Security Authority Service: Windows critical process for user authorization and loging
Martin
lsass by SYSTEM is not a virus (further information...)
George

Summary: 238 users judge lsass.exe to be an essential file that should not be touched. 29 users consider it harmless. However, 75 users consider this to be a suspicious process and would like to get rid of it. For this reason, 192 users have already deleted lsass.exe. source: file.net

How to uninstall the program or IPSEC Services, Protected Storage, Security Accounts Manager

lsass.exe  LSA Shell fix

To remove LSA Shell from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for the program or IPSEC Services, Protected Storage, Security Accounts Manager in the list of available programs.
  5. Click Uninstall.

How to tell if lsass.exe (LSA Shell) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of LSA Shell. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for LSA Shell or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or lsass.exe is causing problems for you, a good Registry Cleaner may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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