What is it exactly that you're trying to open from System Preferences? Are you referring to "Security & Privacy"? What are you attempting to change? We can't read your mind so you need to explain things better before we can offer to help.
Tygrz you been on a pretty steep learning curve this past few weeks eh mate?
Probably more of a "relearning'' curve!! Need to consume more fish & rice. More fish & rice!!
Well, you're in the right place for that! I spent a great 8 years living and working there for the US Govt back some years ago. Would have loved to stay there but it was just too expensive. Can't imagine it's any less expensive now. ;D