Hi Team,
Request you to look into it and revert back.
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Recommendations :
1. Please update the Teefer2.sys Symantec Endpoint Protection filter driver.
Company Name: Symantec Corporation
File Description: Symantec CMC Firewall Teefer2
Product Version: (11.0:4819.5)
File Version: (11.0:4819.5)
File Size (bytes): 62512
File Date: Mon Jan 04 16:34:28 2010
Module TimeDateStamp = 0x4a0b1ec0 - Thu May 14 00:55:52 2009 àUpdate with latest.
2. Exclude the Network interfaces drivers from Antivirus scanning.
3. Update the NIC card drivers /firmware.
4. As a best practice please install these two hotfixes http://support.microsoft.com/kb/2550886 ; http://support.microsoft.com/default.aspx?scid=kb;EN-US;2524478.
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Questions :
Could you please verify with your local network team at the time of issue was there any network related problems?( From network logs).
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References :
http://technet.microsoft.com/en-us/library/cc773562(v=ws.10)