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Unable to map network drive on Server 2003 after Windows updates

I need help here as I have a critical application that is unable to run because I'm unable to map a network drive.

I have a Windows 2003 Server with SP2 which is a domain controller (former PDC) that mapped a network drive to an AIX server.  This morning, there were updates automatically installed to the server via Windows Updates and now I am unable to connect to that network drive.  All other mappings are working fine.  I am able to map network drives to other machines in the domain from this server.  Other servers are able to map a network drive to the AIX server using the same credentials.  There are no errors in the even logs that immediately point to the issue except for failed audits.  

Please help.  This is a mission critical application and I'm unable to find a starting place for the solutions other than to maybe rollback all the updates installed but we're probably talking about over 40 updates that by the way have also been installed on other servers that are working fine.
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BIGservice156
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BIGservice156
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DMTechGrooupCommented:
Can you post up your failed audits?

Also verify from the Unix end what the problem could be..

http://publib.boulder.ibm.com/infocenter/systems/index.jsp?topic=/com.ibm.aix.fastconnect/doc/fastcon/probdet.htm
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BIGservice156Author Commented:
Event Type:      Failure Audit
Event Source:      Security
Event Category:      Logon/Logoff
Event ID:      537
Date:            4/1/2009
Time:            2:45:33 AM
User:            NT AUTHORITY\SYSTEM
Computer:      YCFS1
Description:
Logon Failure:
       Reason:            An error occurred during logon
       User Name:      facet
       Domain:            [b](deleted for security)[/b]
       Logon Type:      3
       Logon Process:      
       Authentication Package:      NTLM
       Workstation Name:      \\RS6000
       Status code:      0xC000006D
       Substatus code:      0x0
       Caller User Name:      -
       Caller Domain:      -
       Caller Logon ID:      -
       Caller Process ID:      -
       Transited Services:      -
       Source Network Address:      10.100.100.3
       Source Port:      0


For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
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BIGservice156Author Commented:
I would also look into your suggestion at the AIX server but I am currently remote and trying to avoid going on site needlessly.  As I mentioned earlier, all other servers can map to the network share with no problem using the same credentials.
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DMTechGrooupCommented:
Can't really find anything from the windows side.. did see something that said to make sure the system time is right.. verify that.  Other than that would have to see what Unix thinks.
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GMorineauCommented:
Conficker?
http://vil.nai.com/vil/content/v_vul40728.htm

It could be.... check serves and look is everything is fine. Today I will a lot of work!

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BIGservice156Author Commented:
DMTech:
I verified the time and that's in synch with the time server.

Gmorineau:
It doesnt appear to be Conficker since I can get to several sites that have been suggested you might not be able to if it was infected with the worm.
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BIGservice156Author Commented:
btw...I am still running a scan with the Symantec Conficker tool though.
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BIGservice156Author Commented:
Thanks all for trying to help.  I am going to close this question since I was able to restore connections by removing all recently installed updates.  I will just have to reinstall the updates one by one until I can figure out which one caused the issue.
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