Forgot Your Account Password
For Snow Leopard and earlier
For Lion/Mountain Lion
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
When the menubar appears select Terminal from the Utilities menu.
Enter resetpassword at the prompt and press RETURN. Follow
instructions in the dialog window that will appear.
Or see Reset a Mac OS X 10.7 Lion Password and
You need to use the method corresponding to the OS X version you are running. The second option, for example, isn't going to work unless you have Lion or Mountain Lion installed. The method for Snow Leopard or earlier requires an installer DVD.
There is not erasing your files.
Select About This Mac from the Apple menu. It will display the installed OS X version.
I believe I have the Lion version and when I tried option two it gave me a few options. I can't remember them all but one was 'search the web for help' and another was 'restore' and things like that. I'm sorry, I can't remember the options exactly. What do I do after that?
And thank you so much for all of your help so far. It really means a lot!