I Just installed Windows 7 on a dell XPS 420 over Windows home premium 64 bit. When I click my user name and password I get a black screen with no taskbaror start menu. It only shows the build version in the lower r/h corner of the screen. I created a new user in safe mode and restarted same problem except screen was powder ble background. How do I get a start menu? I do get taskbar and start menu in safe mode.