Why won't Desktop & Screensaver or Spotlight load when I boot my computer?
I have been troubleshooting this issue for some time. I believe I have narrowed the field of possibilities. Here is a description of what happens when I boot my computer: the white logo screen appears, the circular timer spins, my desktop background image appears, the applications dock becomes available but the primary control bar across the top of the page (with the Apple logo) is not available nor are any of the folders or documents I store on my desktop visible.
The workaround I discovered yesterday is to boot the system, open System Preferences from my applications dock which in turn activates the primary control bar showing System Preferences as the open application. I click on the Apple logo and select 'Logout xxxxxxx' (I have only one user account and it is set up to not require a login password). The login screen appears requiring me to enter my password (I do not use a master password). I do and hit return. My desktop reappears and everything is fine.
Further background: when I open System Preferences I can choose every applet except Desktop & Screensaver and Spotlight and they will immediately open and be functional. If I open D&S or Spotlight they indicate they are loading but the system freezes. At this point I have to go down to System Preferences on the Application Dock and click on Force Quit. The primary control bar across the top disappears. I reopen System Preferences, go to the Apple Logo, choose Logout xxxxxxx, etc., etc.
Does anyone know how to fix this software problem?
Jim
Mac Pro (Early 2008), OS X Mountain Lion (10.8.2)