I have a freshly imaged XP Pro sp2 (volume license) Lenovo Thinkpad T60 (model 2007-geu).
Explorer occasionally hangs after logon. I am left with the background image at time of lockup. Sometimes there are icons, some times there are not. The mouse moves, but does not click. The keyboard commands like Ctrl + Shift + Esc or Ctrl + Esc do not work, but Ctrl +Alt + Delete does.
I have found I can go to Task Manager by using CAD and kill explorer.exe and then File, New Task, Explorer to recover.
I have several of these laptops. I make one image and then Ghost it onto the others. I noticed the problem on the parent and first clone laptop. I have started over from scratch on a third laptop and am getting the same problem. I have all the current drivers and Windows Updates.