Are you sure you want to install "Ubuntu"? I did that one time and when I found out I didn't care for it I couldn't get rid of it. I finally wound up reformatting my hard drive. Of course I lost everything on it. I'll never do that again. I've got too much stuff that won't work with Linux.

Hi, currently have the choice of Ubuntu or XP on boot,seems to be fine,so far,mind you have never had to remove ubuntu yet. As long as your folders and partitions are organiised correctly,shouldn't be a problem.
Sorry can't help with other problem,try the linux forums,maybe?
N2

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There are ways to remove Ubuntu without a full format...

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Sorry... Didn't mean to leave the question 'hanging'...

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How to Remove - Ubuntu Forums