I recently had to rebuild a Small Business Server 2003 Standard after a crash. I then rejoined the workstations to the domain. Subsequently, many of the Windows XP Pro workstation domain members are experiencing intermittent locked profiles when a user attempts to login, usually after several hours of having no account logged in. A reboot resolves the issue.
We are not using roaming profiles or Terminal Services, and UPHClean in its native configuration is not shedding any light. I have removed and reinstalled the Trend Micro AV client, and disabled many (but not all - some are mission-critical) of the third-party startup services/applications. On three of the workstations, I have renamed the profile and started with a clean profile and copied user files over (but not the Application Data or Local Settings folder, let alone the NTUSER.DAT file).
Any ideas? I'm stumped...