The installation for Windows 2000 does not activate the Administrator password until the system has rebooted, which allows remote attackers to connect to the ADMIN$ share without a password until the reboot occurs.
When an administrator in Windows NT or Windows 2000 changes a user policy, the policy is not properly updated if the local ntconfig.pol is not writable by the user, which could allow local users to bypass restrictions that would otherwise be enforced by the policy, possibly by changing the policy file to be read-only.