I have mistakenly installed windows 7 twice to the same partiton (the first installation finished but it did not restart/start windows 7 so I installed windows 7 again to the same partition). now when I open the computer, I get a screen with two options to choose from to boot windows: when I click "Enter" on either of them, it boot windows 7 just fine.. how do I fix it? how do I remove this? I dont want to have to click enter everytime I open my computer.. I have only windows 7 ultimate installed.