OK, I removed the SystemUIServer and almost immediately it came back and appeared in red and next to the name it says (not responding). I also tried moving the com.apple.systemuiserver.plist to the desktop but it doesn't seem to make any difference. I didn't have any of these problems before I installed the 10.5.7 update. Now I can't restart or shut down the computer without holding in the power button. I also cannot place the mouse on the menu bar near the bluetooth, volume control or time machine icons without immediately getting the beachball. I have lost all control of my wireless mouse and can't even access the bluetooth through system preferences. What a mess! I am lost here!