I have a network with dozens of XP clients controlled by a Windows 2008 domain controller. One client, and only one of them, takes 3-4 minutes to log in. This is only the case after a reboot. If I log off and log on as a new user without restarting it works fine. I have tried to login using different usernames after the reboot and it is the same effect for each one, so I do not think it is profile related. I have seen mention of DNS issues causing this problem, but I have followed all the advice along those lines and still the problem persists. I have even installed the Profile Hive Cleanup utility.