Windows 2003 Server Datacenter Edition - Fresh Install w/Norton Corporate Antivirus - Can't connect to windows update, antivirus sites.

I have four Dell PowerEdge 2950 Servers with freshly installed Windows 2003 Server R2 Data Center Edition. I have installed Norton Antivirus Corporate edition on the server and updated the virus definition. I missed running Windows update on them and yesterday got an e-mail from our data center that all these four servers appears to be compromised as they are trying to scan the data center dark IP space. I tried the following:

1. Running the netstat -b command shows the following. Nonw of these IP addresss belong to us:

Proto  Local Address          Foreign Address        State           PID
TCP    Serv01:3325            176.117.30.120:microsoft-ds  SYN_SENT        892
Schedule
[svchost.exe]

TCP    Serv01:1206            58-27-213-86.wateen.net:microsoft-ds  ESTABLISHED     4
[System]

TCP    Serv01:1218            193.108.39.51:microsoft-ds  ESTABLISHED     4
[System]

2. Running Hijack this shows following:

Logfile of HijackThis v1.99.1
Scan saved at 3:48:20 PM, on 4/9/2009
Platform: Windows 2003 SP2 (WinNT 5.02.3790)
MSIE: Internet Explorer v6.00 SP2 (6.00.3790.3959)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\DefWatch.exe
C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\Rtvscan.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\rdpclip.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\system32\msiexec.exe
C:\Program Files\Windows Defender\MsMpEng.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\hijackthis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = res://shdoclc.dll/softAdmin.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = res://shdoclc.dll/softAdmin.htm
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.windowsupdate.com/
O4 - HKLM\..\Run: [vptray] C:\PROGRA~1\SYMANT~1\SYMANT~1\vptray.exe
O4 - HKLM\..\Run: [Windows Defender] "C:\Program Files\Windows Defender\MSASCui.exe" -hide
O20 - Winlogon Notify: dimsntfy - C:\WINDOWS\SYSTEM32\dimsntfy.dll
O20 - Winlogon Notify: NavLogon - C:\WINDOWS\system32\NavLogon.dll
O23 - Service: DefWatch - Symantec Corporation - C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\DefWatch.exe
O23 - Service: Symantec AntiVirus Client (Norton AntiVirus Server) - Symantec Corporation - C:\Program Files\Symantec_Client_Security\Symantec AntiVirus\Rtvscan.exe

As of now, I am not able to open microsoft.com, windowsupdate.com, symantec.com, trendmicro.com. I have tried running windows defender, malwarebytes, superantyspyware and nothing suspiscious was found. Please advise.

Thanks.