Administrative user accounts no longer has admin privs?

[Michael Howard]

The accounts I use for administrative tasks has
apparently lost its administrative status.

When I attempt to install software on a domain account
(including DC's) I'm told that the account does not have
privileges and to log on with one which does.

The account has not had group membership changed. It is
a member of Domain Admins, and Domain Admins is a member
of the local Administrators group (on machines other than
DCs).

Even if I explicity add the accounts to the
Administrators group I'm met with the same message.

This happens on two separate accounts that I keep for
admin tasks--one simply a copy of the other (for testing
purposes).

If I create a new user, assign them to Domain Admins, all
is fine.

This happens on XP clients as well as 2k clients.

 

[Steven L Umbach]

Possibly those accounts are also members of a group that has deny access somewhere to
registry/ntfs acls or those accounts have deny access to registry/ntfs acls. ---
Steve