"I prefer using keyboard shortcuts instead of the point and
click mouse. Thankfully, there's an easy way to turn your keyboards
"Windows key" into an Ubuntu key.
"Go to: System -> Preferences -> Keyboard Shortcuts Scroll
down to the action "Show panel menu" and click on it. (The phrase
"New accelerator menu..." will appear). Now simply press your
Windows key once. (You'll see the accelerator now says "Super L").
Select the "Close" option and you'll see that your Windows key now
works. Note: If you ever want to change it back to the default (for
Hardy 8.04), the original setting is Alt f1."