Windows 7 64bit on dell laptop, any mouse movement within the window area of Windows Explorer (not internet explorer) causes explorer to freeze (hourglass mouse, as if it is fully busy) It takes about 5 or more minutes to allow you your next move, perhpaps clicking on a folder, and then it freezes again with the hourglass for another 5 to 10 minutes. Windows does not lock up; you can run any other application without issues while Explorer is busy in its own little hourglass world. Has anyone at Microsoft ever figured it out or ever experienced it so they can address it?