Failure Audit Event ID 537

My Situation:
My Situation
Domain Server:  Windows server 2003 for Small Business Server Service Pack 2
Intel Xeon CPU 2.80Ghz and 3.62GB of Ram 1 Application server and


Windows XP Professional version 2002 Service Pack 3
Intel Pentium processor 2.80ghz and 1GB of ram
Intel(R) Pro/100 VE Network Card
I connect to company domain via Linksys workgroup switch.


Everyday for past month I get up to 98 occurrences of Event ID 537 and Event ID 529 see

below.  ID-537 is always from my login ID-529 is from several different logins.  I can log

into the network ok but after I've been on for 1-2 hours I begin loosing network

connectivity and the internet hangs or stops alltogether.  I have 13 other users on this

network and none are having this problem.  

Normally I have my workstation plugged into a workgroup switch which is shared by a unix

box.  I tried plugging the network cable directly into the wall port but same thing

happens. Can you tell me how to 1) find out what is causing this.  2) stop it from

happeninng?  3) fix the problem?

I've pasted event log entries below:



Event Type:      Failure Audit
Event Source:      Security
Event Category:      Logon/Logoff
Event ID:      537
Date:            7/3/2009
Time:            10:00:14 AM
User:            NT AUTHORITY\SYSTEM
Computer:      NTSERVER
Description:
Logon Failure:
       Reason:            An error occurred during logon
       User Name:      Deanna
       Domain:            BEALEPRO
       Logon Type:      3
       Logon Process:      Kerberos
       Authentication Package:      Kerberos
       Workstation Name:      -
       Status code:      0xC00002EE
       Substatus code:      0x0
       Caller User Name:      -
       Caller Domain:      -
       Caller Logon ID:      -
       Caller Process ID:      -
       Transited Services:      -
       Source Network Address:      -
       Source Port:      -


For more information, see Help and Support Center at

http://go.microsoft.com/fwlink/events.asp.




Event Type:      Failure Audit
Event Source:      Security
Event Category:      Logon/Logoff
Event ID:      529
Date:            6/29/2009
Time:            5:28:20 AM
User:            NT AUTHORITY\SYSTEM
Computer:      NTSERVER
Description:
Logon Failure:
       Reason:            Unknown user name or bad password
       User Name:      info
       Domain:            
       Logon Type:      3
       Logon Process:      Advapi  
       Authentication Package:      MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
       Workstation Name:      NTSERVER
       Caller User Name:      NTSERVER$
       Caller Domain:      BEALEPRO
       Caller Logon ID:      (0x0,0x3E7)
       Caller Process ID:      1860
       Transited Services:      -
       Source Network Address:      -
       Source Port:      -


For more information, see Help and Support Center at

http://go.microsoft.com/fwlink/events.asp.



Event Type:      Failure Audit
Event Source:      Security
Event Category:      Logon/Logoff
Event ID:      529
Date:            7/1/2009
Time:            12:46:05 AM
User:            NT AUTHORITY\SYSTEM
Computer:      NTSERVER
Description:
Logon Failure:
       Reason:            Unknown user name or bad password
       User Name:      adminprog
       Domain:            
       Logon Type:      3
       Logon Process:      Advapi  
       Authentication Package:      MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
       Workstation Name:      NTSERVER
       Caller User Name:      NTSERVER$
       Caller Domain:      BEALEPRO
       Caller Logon ID:      (0x0,0x3E7)
       Caller Process ID:      1860
       Transited Services:      -
       Source Network Address:      -
       Source Port:      -


For more information, see Help and Support Center at

http://go.microsoft.com/fwlink/events.asp.




Event Type:      Failure Audit
Event Source:      Security
Event Category:      Logon/Logoff
Event ID:      529
Date:            6/29/2009
Time:            5:28:08 AM
User:            NT AUTHORITY\SYSTEM
Computer:      NTSERVER
Description:
Logon Failure:
       Reason:            Unknown user name or bad password
       User Name:      admin
       Domain:            
       Logon Type:      3
       Logon Process:      Advapi  
       Authentication Package:      MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
       Workstation Name:      NTSERVER
       Caller User Name:      NTSERVER$
       Caller Domain:      BEALEPRO
       Caller Logon ID:      (0x0,0x3E7)
       Caller Process ID:      1860
       Transited Services:      -
       Source Network Address:      -
       Source Port:      -


For more information, see Help and Support Center at

http://go.microsoft.com/fwlink/events.asp.





Event Type:      Failure Audit
Event Source:      Security
Event Category:      Logon/Logoff
Event ID:      529
Date:            6/29/2009
Time:            5:28:11 AM
User:            NT AUTHORITY\SYSTEM
Computer:      NTSERVER
Description:
Logon Failure:
       Reason:            Unknown user name or bad password
       User Name:      test
       Domain:            
       Logon Type:      3
       Logon Process:      Advapi  
       Authentication Package:      MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
       Workstation Name:      NTSERVER
       Caller User Name:      NTSERVER$
       Caller Domain:      BEALEPRO
       Caller Logon ID:      (0x0,0x3E7)
       Caller Process ID:      1860
       Transited Services:      -
       Source Network Address:      -
       Source Port:      -


For more information, see Help and Support Center at

http://go.microsoft.com/fwlink/events.asp.