First, try repairing the permissions from within the Disk Utility app.
When done, try the System Preferences again
If that fails,
Go to the Library that is in your Home folder.
Find the Preferences folder and find the Finder preferences.
Drag the file onto the desktop, log out and back in.
Try the System Prefences again
in sys pref menu line, when i click "show all" nothing shows. in the sys pref menu list, no items show when i click on them. when i click on the "apple" to show sys. pref menu, the window does not open.