Local Security Authority Process high CPU usage on Windows 11

by Loredana Harsana
Loredana Harsana
Loredana Harsana
Managing Editor
Loredana is a passionate writer with a keen interest in PC software and technology. She started off writing about mobile phones back when Samsung Galaxy S II was... read more
Affiliate Disclosure
  • High CPU usage from a buggy LSASS program can lead to several issues including a slow computer. 
  • Some of the solutions we recommend include checking for fixes through the windows update, restoring your system and using an antivirus program to fix it.
  • It is important that you keep your computer well protected from viruses and updated at all times to avoid such issues.
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Also known as the LSASS.exe, the local security authority process is an executable file that handles the security operations for your Windows computer.

This includes functions such as password authentication, password changes, and creating access tokens across multiple applications. 

If you are having issues with your Local security authority using too much CPU power, it is possible that your system could be compromised. 

This leads to the program taking up too much CPU power and hogging the memory.

What can I do if my PC’s Local Security Authority is using high CPU?

1. Check for Windows Update

  1. Go to your search button on the bottom left part of your screen. search box
  2. Type Settings and click on the App. open settings
  1. The settings up will open with different options.
  2. Scroll down and select Update and Security.select Update and Security
  1. Click the Check for Updates button and let your computer check for available Windows updates. This might take some time. Check for updates
  1. If you are up to date, move on to the next solution. If not, consider downloading and installing the updates. 

Sometimes, Windows updates come with bugs and glitches that affect the local security authority. Microsoft routinely sends out fixes with subsequent updates which are sometimes not immediately downloaded to your system. 

2. Scan for viruses 

2.1. Check for fake LSASS.exe programs on your computer.

  1. Open your file explorer. On the This PC window, click on your local disk (C:). Local disk C
  2. Scroll down to Windows and hit Enter. Windows
  3. Scroll down to system32 and hit EnterSystem32
  4. Check whether the lsass.exe file is correctly spelt and is to an unusually large file. Lsass.exe file
  5. Delete any program that is wrongly misspelt. 

2.2. Use an Antivirus

The best and safest way of getting rid of any malicious files and programs from your computer is through an antivirus program. 

If you are looking for reliable antivirus protection, consider using ESET Internet Security. It is designed to protect your system against corruption from such malicious programs.

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3. Do a system restore

  1. Go to your search button at the bottom left of your screen and search for Create a Restore Point Search-for-system-restore-point
  1. Select the System Protection tab to open it 
  2. Find and select System Restore. Then hit Next. system-properties
  1. Pick a restore point and select scan for affected programs. This option will let you know what changes to expect. 
  2. Close the scan for the affected programs Window.
  3. Select Next and follow the prompts to create a restore point for your computer. 

Note that you might encounter an error on step 2 if you have never created a system protection system before. system-protection

This means you won’t be able to apply this solution to your computer and should move on to the next solution. 

Consider setting up the protection and if you encounter issues, this detailed guide will help you out. 

Did any of the fixes work for you?

Remember to always keep your system well updated at all times to keep your computer system healthy and robust. 

If you have additional fixes, feel free to leave them in the comment section below. 

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