I have a user who managed to lock himself out of Access. I don't know what he did, and he doesn't remember (of course). What happens is when Access is started it's just a blank screen (like usual). When you try and do anything, open a database, create a new database etc (on our server or the local machine) a prompt comes up asking for a username and password (pic here). We've tried every password and username combination we can think of, and nothing works. We've re-installed office on his machine, same problem. Everyone using the machine has the problem, domain users, local users, everyone. All his other office programs work just fine. The only thing he can tell me is that he was screwing around in Tools/Security/User and Group Accounts because he was trying to change the password on a password protected Access database file. He clicked "Clear Password" and since then he has had this problem. I'm pulling my hair out here, plus I'm not too up on Access, any thoughts? Thanks!