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I cannot start my windows xp laptop, I have an error message that says: "lsass.exe - Application Error"

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4 replies to this topic

#1 gringo_jesus


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Posted 25 October 2010 - 10:16 AM

Hello everyone,
I recently had a virus on my Windows xp computer (one of those ones that pretends to be an anti-virus program telling you your computer is infected). Before I had the chance to remove it I found I was unable to start up my computer. Instead of the usual user login screen I had a black screen with this message:

"lsass.exe - Application Error". The application failed to initialize properly (0xc0000005). Click on ok to terminate the application

Once I click okay nothing happens, the screen just remains blank. I have tried going into safe mode (F8 key) but it doesn’t seem to work. I hold the button down but the computer just loads up like normal and goes onto the dreaded black screen.

I have done some quick research and found that the problem is either the OS is broken, or a virus is pretending the OS is broken. Either way I have no idea what to do.

Any help is much appreciated. Please note however I am pretty clueless when it comes to computers, thus please try to assume as little prior knowledge as is reasonably possible and include simple step by step instructions if you can. I apologise for my ignorance.

If you need any further information let me know. Note as I have no laptop currently I will have to wait until I am in work to respond.

Thanks in advance!

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#2 dc3


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Posted 25 October 2010 - 10:35 AM

Hi gringo_jesus, and welcome to BleepingComputer.

Please post the make and model of this computer.

Family and loved ones will always be a priority in my daily life.  You never know when one will leave you.





#3 JSntgRvr


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Posted 25 October 2010 - 12:34 PM

Hi, gringo_jesus. :flowers:


If you have a Windows XP installation CD, please try this first:

You will need a blank CD, the Windows XP install disc, a clean computer and a flash drive.

Please print this guide for future reference and save it in the USB drive!

Please follow the steps below and let me know if you were successful. Please tell me what error messages you got and/or what steps you got hung up on.

1. Download the PE Builder to your desktop

  • Double-Click on the PE Builder that you just downloaded to your desktop.
  • Follow all of the instructions/prompts that come up.
2. Insert your XP CD with SP1/SP2/SP3 into a CD Rom drive
  • Double-Click on PE Builder.exe located on your desktop.
  • Click NO to Search for Windows Installation Files
  • Make the following selections from the Main Screen that pops up:
  • Builder
  • Source: (path to Windows installation files)
  • Enter the path to the drive where your XP CD is located.
  • You can click on the "..." button on the right to navigate to the path as well.
[*]Custom: (include files and folders from this directory)
  • No information is necessary, leave blank.
  • Keep the default
  • Media output
    • Choose Create ISO image
    • Do not choose Burn to CD/DVD
    • Download the RunScanner plugin and save it to your desktop

    Please note: You will be prompted for the folder that it shall be saved. By default it appears as runscanner10025. It should be modified to just runscanner <--- Important!!!

    • Press the Plugin button on the PE Builder interface
    • Press the Add button and navigate to the location of the RunScanner plugin to install
    • Please note: If you are using a Windows XP disc with sp2 then highlight RpcSS needs to launch DComLaunch and then press Enable
  • When your done press Close and the PE Builder interface will re-appear
3. Click on the "Build" button
  • You will see the Windows EULA message. Click on I Agree
  • You will now see the Build Screen. Let it run it's course
  • When the Build is finished you can click close, then exit
4. Burn your ISO file to CD


From your clean computer..

Please download OTLPE.zip and save it to a flash drive.

Double click and unzip OTLPE.zip to its own folder on your flash drive. Name it OTLPE <-- Important!!


Plug your flash drive into your sick computer now and do as instructed below..


1. Restart Your sick Computer Using the PE Builder ISO CD That You Have Created
  • Insert the CD in to one of your CD/DVD drives.
  • Restart your computer.
    • The computer should choose to boot from the CD automatically. If it doesn't and you are asked if you want to boot from CD, then choose that option.
  • Once the desktop appears, you will receive a message asking: Do you want to start Network support?
    • Click on No
  • After it loads press the Go button in the lower left and do this....
    • Go
    • System
    • Display
    • Screen Resolution
    • 1024x768
    Next choose....
    • Go
    • Programs
    • A43 File Management Utility

In A43File Management you should see your flash drive
Navigate to the OTLPE folder that you saved to your flash drive.

Open the OTLPE folder and double click Start.cmd.
  • When asked "Do you wish to load remote user profile(s) for scanning", select Yes
  • Ensure the box "Automatically Load All Remaining Users" is checked and press OK
  • OTLPE should now start

    Change the following settings
    • Change Services, Drivers, Standard and Extra Registry to All
    • Uncheck LOP and Purity check

    Please note: Stay with your computer during the course of the scan. If "Entry Point Errors" are encountered simply press "ok" and allow the program to continue. <-- Important!!

  • Copy and Paste the following code from your flash drive into the Posted Image textbox. Do not include the word "Code"

    %ALLUSERSPROFILE%\Application Data\*.
    %ALLUSERSPROFILE%\Application Data\*.exe /s
    %APPDATA%\*.exe /s
    %systemroot%\system32\drivers\*.sys /lockedfiles
    %systemroot%\*. /mp /s
    %systemroot%\system32\*.dll /lockedfiles
    %systemroot%\system32\drivers\*.sys /90

  • Push Posted Image
  • A report will open named "OTL.txt" (C:\OTL.txt) . Save this log's to your flash drive. Copy and Paste this in your next reply.

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If I have helped you, consider making a donation to help me continue the fight against Malware!

#4 gringo_jesus

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Posted 29 October 2010 - 06:54 AM

Thanks for your input guys (particularly JSntgRvr). In the end my brother took the computer to his friend (who happens to be a computer expert). He said it was in fact a virus, and seems to have removed it successfully. Apparently the error message wasn't "lsass.exe" but "isass.exe", due to the font on the laptop both look the same. If you have the latter on your computer it means its a virus rather the an OS error.

Hope this information (such as it is!) is helpful to someone. And thanks again to this fine community!

#5 JSntgRvr


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Posted 29 October 2010 - 09:26 AM

Thanks for the feedback.

Since this issue appears to be resolved ... this Topic has been closed. Glad we could help.

If you're the topic starter, and need this topic reopened, please contact a staff member with the address of the thread.

Everyone else please begin a New Topic.

No request for help throughout private messaging will be attended.

If I have helped you, consider making a donation to help me continue the fight against Malware!

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