lsass.exe error?

Computers on my LAN suddently show a popup window notice that :

lsass.exe error...
The computer will shutdown in 60s. Please close all programs.

This notice appear randomly.
I can't understant what's happen? May be virus?
Have you ever experience this problem before?Could you give me a direction about this.
nguyen_vantuananhAsked:
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hongjunCommented:
Sasser Worm
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woodendudeCommented:
You've been hit with the sasser worm, here's microsofts removal instuctions.http://www.microsoft.com/downloads/details.aspx?FamilyID=76c6de7e-1b6b-4fc3-90d4-9fa42d14cc17&displaylang=en
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SheharyaarSaahilCommented:
More Info.....

What You Should Know About the Sasser Worm and Its Variants:
http://www.microsoft.com/security/incident/sasser.mspx

Apply MS Security Bulletin:
http://www.microsoft.com/technet/security/bulletin/ms04-011.mspx

Use One of the Following Removal Tools to Delete the Virus:
======================================
1) Sasser (A-F) Worm Removal Tool (KB841720) >> http://www.microsoft.com/downloads/details.aspx?familyid=76C6DE7E-1B6B-4FC3-90D4-9FA42D14CC17&displaylang=en

2) FxSasser.exe.from Symantec >> http://securityresponse.symantec.com/avcenter/venc/data/w32.sasser.removal.tool.html

3) Stinger from McAfee >> http://vil.nai.com/vil/stinger/

4) SysClean PACKAGE from TrendMicro >> http://www.trendmicro.com/download/dcs.asp

5) SASSGUI\SASSSFX from Sophos >> http://www.sophos.com/support/disinfection/sasser.html

6) ClnSasser from Computer Associates >> http://www3.ca.com/Files/VirusInformationAndPrevention/clnsasser.zip

7) F-Sasser from F-Secure >> http://www.f-secure.com/tools/f-sasser.zip

8) SasserFix2 from Norman >> http://www.norman.com/Virus/Virus_removal_tools/14938

9) QuickRemover from Panda >> http://www.pandasoftware.com/virus_info/encyclopedia/overview.aspx?lst=sol&idvirus=46865
---------------------------------------------------------
NOTE: plzz see the Relevant Sites for FULL Instructions on Removal in the First Link Before using the Tools
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