Adprep failed in the attempt to add the Anonymous Logon SID to the Pre-Windows 2000 Compatible Access group. Status/Consequence ...

Windows 7

Adprep failed in the attempt to add the Anonymous Logon SID to the Pre-Windows 2000 Compatible Access group.
[Status/Consequence]
For backward compatibility, Adprep requires that the Anonymous Logon security group be a member of the pre-Windows 2000 Compatible Access security group if the Everyone group is also a member. On Active Directory Domain Controllers running Windows Server 2003 or newer, the Everyone group no longer includes Anonymous Logon.
[User Action] 
Check the log file ADPrep.log in the %1 directory for more information.

Adprep detected that the logon user is not a member of the following groups: Enterprise Admins Group, Schema Admins Group ... Adprep detected that the logon user is not a member of the following groups: Schema Admins Group and %1\Domain Admins Group. ... Adprep did not attempt to add Anonymous Logon SID to Pre-Windows 2000 Compatible Access group because Everyone is not a member ... ADPREP does not permit forest and domain preparation on Windows Server 2003 Beta 2 Active Directory Domain Controllers. Status/Consequence ... Adprep failed in the attempt to add the Anonymous Logon SID to the Pre-Windows 2000 Compatible Access group. Status/Consequence ... Adprep failed to verify the consistency of Win2K schema. Status/Consequence The Active Directory Domain Services schema is ... Adprep failed to verify whether a conflict exists with the Exchange schema. Status/Consequence The Active Directory Domain ... Adprep failed to verify whether schema master has completed a replication cycle after last reboot. Status/Consequence The ... Adprep failed while performing Exchange schema check. Status/Consequence The Active Directory Domain Services schema is not ...