If you can’t access your shared folders on windows 2008 check the thinks bellow.
The issue can happen if you have certain versions of Symantec Endpoint Protection or Antivirus installed
To resolve the issue update
To resolve this issue, upgrade the Symantec Endpoint Protection software to Symantec Endpoint Protection 11.0 MR3.
you can find more information on the issue Here http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2008091611042748 or http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2008091611042748)
http://www.symantec.com/business/support/index.jsp
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