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This question already has an answer here:

I have a laptop running Windows 8 and Ubuntu 12.10 but I have issues with installing programs in Ubuntu and the only option is to reinstall. I do not want to format my laptop, i.e. my Windows 8 should stay.

My desire is to install Ubuntu afresh on the partition where it is now without further partitioning. How do I install over the existing installation?

This question was flagged a duplicate but I the other post on a similar did not address my issue.

Sorry for the confusion guys. The link was really helpful.

many thanks.

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marked as duplicate by Oli Nov 27 '13 at 14:37

This question was marked as an exact duplicate of an existing question.

How does it not address your issue? Seems to answer it just fine. – Seth Nov 27 '13 at 16:15
If it doesn't you must explain "how so". – Braiam Nov 28 '13 at 3:18
  • Boot ubuntu installation disk,and run install ubuntu option.

  • Select something else option to manually select the partition where you are going to install ubuntu.

  • Select the already installed ubuntu 12.10 partition and format it to ext4 filesystem.

  • Then choose the same formatted partition,to install or reinstall ubuntu.

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