How do you make a Dell Latitude D531 with Ubuntu 11.10 show the task bar and unity dock?

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http://askubuntu.com – I recently installed Ubuntu 11.10 on a Dell D531 Laptop instead of Windows 7. The install finished and I rebooted the laptop. To install Ubuntu 11.10, I used a cd. When logged in, the screen shows the background only. I'm now afraid I've made my laptop into a paperweight. (HowTos)