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Lsass.exe - operation failed

By surfersaiyan ยท 28 replies
Feb 20, 2009
  1. Squiggly1

    Squiggly1 TS Rookie Posts: 44

    I would run a virus scan on the drive. Not sure your level of computer expertise, but this can be done with a USB to SATA/EIDE adapter to connect to a second computer, or by connecting the drive to a 2nd computer as a slave or second drive.
    If a virus cleaning doesn't work then hit F8 (most PC's) at startup to see if you can start with the command prompt to do a system file checker, then try last known good configuration.
    I'm not sure if a corrupted password itself would cause this. Probably not. Probably the lssas program itself. Just to be sure you could try resetting your log on password with NT Registry & Password Editor. It's an offline program (freeware) that boots from CD at startup.
    If you still can't get to the desktop, then try a repair install. Often a repair install doesn't fix these things. Then you're left with nothing but to reinstall Windows.

    If you have the Sasser worm then here's Microsoft's removal tool http://www.microsoft.com/security/malwareremove/default.aspx
  2. Bobbye

    Bobbye Helper on the Fringe Posts: 16,335   +36

    Check the Event Viewer for any Error that corresponds to the time of this message:

    Start> Run> type in eventvwr

    Do this on each the System and the Applications logs:

    • [1]. Click to open the log>
      [2]. Look for the Error>
      [3] .Right click on the Error> Properties>
      [4]. Click on Copy button, top right, below the down arrow >
      [5]. Paste here (Ctrl V)
      • You can ignore Warnings and Information Events.
      • If you have a recurring Error with same ID#, same Source and same Description, only one copy is needed.
      • You don't need to include the lines of code in the box below the Description, if any.
      • Please do not copy the entire Event log.

      Errors are time coded. Check the computer clock on at message time.

  3. surfersaiyan

    surfersaiyan TS Enthusiast Topic Starter Posts: 100

    guys, thanx for all your tips, ideas and support!

    i'm going O/S for a couple of weeks tomorrow so i'm not gonna be able to get onto this til i get back.. bar a bit of bludging on the packing that is ( i doubt the missus'd be too happy!).

    but i'll get onto it for sure then..

  4. surfersaiyan

    surfersaiyan TS Enthusiast Topic Starter Posts: 100

    i think it may have all come down to a dodgy HDD.

    i blasted the hard drive and reinstalled windows. and within about 3 days i couldnt connect to the internet. kept getting the message...

    "the network did not assign your computer a network address"

    and it was doing this infrequently before.

    so i've gone back to the original HDD i got with the laptop and two weeks later have had no troubles, no internet connection issues and no lsass.exe probs either.

    just for those keeping an eye out for it.. i got an adapter and used a 16GB CF card instead of a hard drive just for testing purposes.

    i dont know if i'm doing something wrong but it took me like a full day to install windows and about 10minutes to install just about anything on it. i woulda thought it woulda been faster than that.

    when up and running it works fine but a bit slow.. any ideas?
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