I just clean reinstalled Lion 10.7.5 on my MacBook and Software Update immediately found new software. Among its finds was an Apple Remote Desktop update, which I failed to uncheck before proceeding to instal the updates. Since I don't use Apple Remote Desktop I'd like to undo this update if possible, in keeping with the idea that simplicity should be maximized. Verifying disk permissions after the update also resulted in one error: Repairing permissions for Untitled Group differs on Library/Preferences/com.apple.alf.plist; should be 80; group is 0. Repaired Library/Preferences/com.apple.alf.plist Warning: SUID file System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAgent has been modified and will not be repaired. Can this unwanted change be easily undone? Could it be a potential security liability? Thanks for any insights.