Currently Being ModeratedAug 24, 2013 12:57 PM (in response to Points of Authority)
Most likely these applications were installed using Drag and Drop, so they are connected to the username and password used when they were installed. So, try changing both. If that doesn't work then try this:
Assuming that you are using a recent build of OS X, go to /Applications/Utilities and launch the app called Keychain Access. Go to the Window pulldown menu and select "Keychain First Aid". Enter your password, set the radio button to "Repair", and click "Start".
Currently Being ModeratedAug 24, 2013 1:04 PM (in response to Kappy)
i haven't got a password before, and my sisters keep downloading these useless apps an that's why i add a password. and what did you mean by window pulldown menu? can you please show me the steps?