Here's a few things to try:
1. Open Finder -> Click Go -> Hold down the option key (ALT) -> Click Library -> Open Preferences -> Look for com.apple.systempreferences.plist -> move this file to your desktop -> Restart the machine.
2. Try a new user account -> problem still persists there?
3. Finder -> Applications -> Utilities -> Disk Utility -> Select your hard drive -> First Aid Tab -> Verify Disk Permissions -> Repair Disk Permissions -> Verify Disk (If this comes back in green writing saying your disk appears to be OK, then you don't need to repair the disk)