I have a 2010 Macbook Pro. I recently upgraded to Mountain Lion. The problem occured when I tried to turn on Parental Controls for a User Account on my computer. Somehow, accidently, I put the lock on my Administrator's Account and now it says it is Managed. When I tried to turn off Parental Controls it asked me for my Administrator's name and password. I've never before been asked to input my admin name, it is usually already in the line above the box for my password. When I entered what I thought was my administrator's name and password, it says one or both are wrong. I have a login password on my computer and that works fine and I thought this password was the same. I can't access any web secure sites and need to turn off the parental controls. Unfortunately, I've scratched the orignal startup disk so can't use that but I did try reinstalling Mountain Lion from the Mac store - with the same result - access denied to turn off parental controls. I can't access anything on my computer that might require an administrator's name and password. Now what??