Lsass.exe - operation failed

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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
 
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)
    [6].NOTES
    • 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.

    [finally i just wonder if you think it might be anything to do with my version of windows. i use a stripped out version of XP i got from the internet called performance edition.

    basically its a stripped out version and doesnt have anything you dont need. you can check the latest version on torrentreactor here http://www.torrentreactor.net/torren...-April-2009-V2/QUOTE]

    From the TorrentReactor site:
    07/06 Performance Edition Windows XP full download 554 Mb LatestDownloads 475 Other
    Torrent health
    07/06 [highspeed] Performance Edition Windows XP by 1Release Group 184 Mb DownloadAccess 73 Other
    Torrent health
    07/06 Performance Edition Windows XP + Crack 176 Mb DownloadAccess 338 Other
    Torrent health
    07/06 Performance Edition Windows XP.rar 138 Mb LatestDownloads 59 Other
    Torrent health
    07/06 Full version Performance Edition Windows XP

    Do you have a pirated version? Downloading an operating system from a file sharing site wouldn't be anything I'd encourage.
 
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..

x
 
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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