Tag Archives: stop lsass.exe high CPU

What is lsass.exe how to fix lsass.exe system error


   My laptop has run a low performance recently, I noticed that a process lsass.exe consumer high CPU resource, I try to end the lsass.exe process via windows task manager and then my laptop reboot automatically, I get a lsass.exe system error message when my laptop reboot, The lsass.exe error message is: "lsass.exe failed to initialize properly. Click ok to terminate". I clicked OK, all went black, I waited a few minutes, nothing happened but a black screen with a movable mouse pointer. I reboot my laptop several times, but got the same issue and same lsass.exe system error message.

Is this a Trojan or system problems? How to fix this lsass.exe error? Please help…


The process lsass.exe is the Local Security Authority Subsystem Service of windows operating system, lsass.exe checks whether a user’s supplied identification is valid or not for the winlogon service. If authentication is successful, Lsass.exe create the current user’s access tokens. The process Lsass.exe is a system process, it should not be stopped.

The lsass.exe file is located in windows system folder C:\Windows\System32. If you found lsass.exe in other folders, it maybe a virus, malware, spyware or Trojan!

Please following the below steps to fix the lsass.exe system error:

A. Boot up your pc in windows safe mode with network.

B. Download Wise PC Doctor(free download link ) to scan and fix your pc errors.

C. Download Avast AntiVirus Pro(free download link ) to scan your pc and remove the detected virus or spywares.

D. Restart your pc.

If your pc couldn’t boot into windows safe mode, please following these steps to fix lsass.exe error:

A. Booted the system with BartPE(download link) and then run regedit.exe.
B. Imported the registry hive "C:\windows\system32\config\software"
C. Located the following key:

Microsoft\Windows NT\CurrentVersion\Windows
D. Renamed "AppInit_DLLs" to "AppInit_DLLs.bak" and then created a new string value "AppInit_DLLs" with no entries.
E. Unloaded the registry hive and reboot your pc.
F. Dwnload Wise PC Doctor(free download link ) to scan and fix your pc errors.

G. Reboot your pc again.

How to get rid of Lsass.exe virus/Trojan/worms automatically?

You will need to download and burn into CDROM several programs on clean PC or copy them to USB Disk to remove virus. Here is the instruction:
Step A:
copy the below programs to USB disk (you can use an MP3 player) or Burn them to CD:

  1. Avast Pro Antispyware software(free of charge) .Please download with this Download Link.

Remove Lsass.exe virus

2.Wise PC Doctor:with this download link to restore damaged registry values.

fix lsass.exe system error

free ix lsass.exe system error tool

Step B: Restart your computer. At this point you need to gently Press the F8 key repeatedly when you find the startup menu, Select the option “ Safe Mode with Networking” by using the arrow key, then press Enter key on your keyboard , and your computer will start into Windows Safe Mode.

Step C: Now you need to install Avast Pro Antispyware on your computer, When the program is installed, your need update its database to the latest, then reboot your computer to make the program fully functional, Go Step B to reboot your computer into Safe Mode and do a complete scan for your computer .


(1)In case you have some problems running Avast Pro Antispyware, you may rename the downloaded file name to explorer.exe or iexplore.exe. After that double click the download file and follow the install steps.

(2) Please make file extension show before renaming download file.

Step D: After finish the full scan, click "Show Results" and be sure that the important data aren’t removed and infected. Select or ignore the scan result and click "Remove Selected" button to get rid of the virus and malwares. Avast Pro Antispyware will give you a report to indicate all operations for this scan. It can be saved as you want. Restart your computer and the Avast Pro Antispyware will get rid of all virus or malwares which are detected before.

Step E: How to erase bad registry? Please install Wise PC Doctor– the best PC cleaner can easily fix your broken registry values and restore registry values.

Why Wise PC Doctor should be used?

As we all know, virus, Trojans and Malwares make the computer breakdown by destroying and modifying the registry values so that the computer will not run normally.

After the virus, Trojans and Malwares are removed, the registry remains to be destroyed or modified, therefore the computer’s system still has some problems. That’s why you really need to fix the registry. Furthermore, some virus, Malwares and Trojans leave many dll data in the registry and this may cause damaged DLL errors and also have an effect on the computer’s system performance.

In any other case Uninstall or install software may make your registry database fragmented, with corrupted, harmful and obsolete files. Do a complete scan for your computer by Wise PC Doctor at this moment.

Step F: Run Wise PC Doctor to repair your computer:

1. Install Wise PC Doctor.

2. Click "One-Click Fix", do a complete scan for your computer.

3. Click “Repair All” then fix all detected problems.