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So I have already made a partition of 100 GB in windows but when I loaded ubuntu 13.10 from a usb stick and tried installing it ubuntu didn't give me the option of installing along side windows. When I clicked something else and then clicked on 100 GB free disk space it still wouldn't let me. This is the first time for me to install a new OS so simple anwers would be the best.

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up vote 0 down vote accepted

100 GB partition created on Windows should not be an ext4 partition,so you can't install Ubuntu on it.

Try to format the 100 GB partition into ext4 filesystem.To do this,

  • Boot the Ubuntu live disk.Select the try Ubuntu option on startup.

  • Now open Gparted partition Editor from dash.

  • Right click on the 100 GB partition and select "Format to" option to format it into ext4 filesystem.

  • Now run the Ubuntu installer and then choose something else option.This time you can be able to install Ubuntu on that 100 GB partition.

Note:Make sure that the 100 GB partition is unmounted.

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