http://blogs.technet.com/gpguru/archive/2008/09/11/group-policy-settings-are-not-applied-on-member-computers-that-are-running-windows-server-2008-or-windows-vista-sp1-when-certain-smb-signing-policies-are-enabled.aspxConsider the following scenario: • The following policies are enabled on a domain controller that is running Windows Server 2003 in a domain: • Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Microsoft networken-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/gpguru/archive/2008/09/11/group-policy-settings-are-not-applied-on-member-computers-that-are-running-windows-server-2008-or-windows-vista-sp1-when-certain-smb-signing-policies-are-enabled.aspx#3122413Thu, 11 Sep 2008 14:28:58 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3122413WinAntiSpyware<p>Your current antivirus solution is not protecting you</p> <p>against Spyware and Adware. Get real protection!</p> <p><a rel="nofollow" target="_new" href="http://www.go4soft.net">http://www.go4soft.net</a></p> http://blogs.technet.com/gpguru/archive/2008/09/11/group-policy-settings-are-not-applied-on-member-computers-that-are-running-windows-server-2008-or-windows-vista-sp1-when-certain-smb-signing-policies-are-enabled.aspx#3156475Wed, 19 Nov 2008 21:15:12 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3156475Ron Woods<p>It appears this may also happen on the Windows 2008 Domain Controller itself? From the DC I am getting this same error and having trouble opening group policies etc... I tried the policy modifications, I will now grab the hotfix and see how it goes.</p>