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I have a couple of questions:

  1. Are my files safe when I upgrade (from the update manager) from 12.04 to 13.04? Are my files safe if I upgrade from the 13.04 install disc?

  2. Are my files safe if I dual-boot windows with ubuntu?

  3. Can I use multi-boot? More than two OSs on my hard disk (3TB, 2TB, 1TB)

  4. Is there a book for transitioning from windows to ubuntu?

Also, could you answer without using any technical jargon? I'm a newbie to ubuntu.

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closed as not constructive by gertvdijk, aquaherd, belacqua, Eric Carvalho, Thomas Ward Jun 21 '13 at 2:06

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

I'd advice you to update your question to include one specific question, so that it can be answered effectively. – green Jun 20 '13 at 20:16
Welcome to Ask Ubuntu. Please don't write in all caps - that is considered rude. Also keep it to one question per post. And at last but not least, this is not the right place for urgent matters - this is not a call centre. See How do we deal with “urgent!” questions?. I've voted-to-close your question because it's not fit for this site as it stands. – gertvdijk Jun 20 '13 at 20:17
To answer in short, yes, yes, yes, and yes. For the last question take a look here – Rrjrjtlokrthjji Jun 20 '13 at 20:30
possible duplicate of Can I skip over releases when upgrading? – aquaherd Jun 20 '13 at 20:54
  1. In short, it is safe. But you should always have a backup of your data available.

  2. Of course, no matter if you installed Ubuntu using Wubi (Installer through Windows) or at onother partition in your hard drive.

  3. Dual Booting Windows and Ubuntu (from the Ubuntu Help page)

  4. You can have a look at the Ubuntu Manual which is available for free.

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