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I've downloaded Ubuntu application on my computer (Windows) to put it on a pen drive and install Ubuntu on an other computer. Then I've installed Ubuntu on this other computer and everything was all right with this one. But then I started the first computer and Windows had disappeared, and instead the computer started Ubuntu! I didn't install Ubuntu on this computer, I've just downloaded the application. I want to access Windows. What can I do?

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closed as not a real question by Ringtail, Tom Brossman, hexafraction, Eric Carvalho, Anwar Shah Jan 9 '13 at 8:10

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Do you have the flash drive plugged into the first computer? If you do, shutdown the computer and unplug the flash drive. Then turn the computer back on. – Seth Jan 8 '13 at 22:22
there is no flash drive. and when the ubuntu open, appear the instalation menu for ubuntu. then i close this menu and the ubuntu open – tobias Jan 8 '13 at 22:35
What is your primary boot option? Are you sure you haven't installed Ubuntu on this PC? Did at any point during your Ubuntu install the question: Install along side Windows? How many partitions do you have? – bioShark Jan 8 '13 at 22:38
@tobias It's extremely difficult to make sense of the information you're giving us, since it's spanned across a number of comments. Please edit your question to include all this information. (Then you can remove your comments.) This should make it possible for people to understand your situation, so a solution could be given. – Eliah Kagan Jan 8 '13 at 22:57

Do you have your flash drive plugged into computer one? If you do it might automatically boot into Ubuntu.

If your flash drive IS plugged in:

  1. Turn off the computer.

  2. Unplug the flash drive

  3. Turn the computer back on, you should boot into Windows.

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