I forgot the password of my account so I went to my OS X disc and reset my password. Then the problems start. OS X frequently asks me for "login" keychain password. I have probably fixed it by deleting ~/Library/Keychains/login.keychain. OS X now asks me for "login" keychain password less frequently, but it still shows up. Also, Time Machine no longer backs up my computer - It stucks at preparing backup. I have turned it off and turned it on and chose the backup drive again, still no luck. I am using OS X Leopard with 10.5.6 and a Time Capsule. Thanks for your help. Ed: The above problems seem to be solved but I have a new problem. Please read #3. Thank you very much.