[Fix] “Click the lock to prevent further changes” not working after Lion Upgrade

I faced this peculiar issue after I performed the Lion upgrade wherein Pushing the “Lock to prevent further changes” in System Preferences just wouldn’t work.

All it did after clicking was to change the icon for a split second and go back to the unlocked state.

Well I found the solution which finally fixed the issue for me.

Step 1: Open Disk Utility > Select your Macintosh HD > Perform a Permission Repair

Step 2:

  • Open System Preferences

  • Go to Security and Privacy
  • Click the Lock to make changes and Enter your Login credentials
  • Make sure “Require an administrator password to access system preferences with lock icons” is Checked.
  • If it was already ticked, untick it and tick it again.
  • The problem should now be solved!