Ubuntu 13.10 doesn't allow me to install "alongside" Windows, just "replace"

I have a disk with 3 partitions:

  • 100MB for Windows 7
  • 97.56GB for Windows 7
  • 125.91 which I want to install Ubuntu on

How can I install Ubuntu on the 125.91 GB partition "alongside" Windows 7 (including grub etc) so I can dual boot between the two? Usually I get the "alongside" option available.

If I select "something else", click on the 125.91GB partition and then "install now" it says

"No root file system defined".


Solution 1:

  • After selecting something else , you would be presented with the window which contains all your partition.
  • Select the partition on which you want to install ubuntu (in your case it is 125.91 GB partition ).
  • Now click on edit partition, It will present a popup window . Select "partition type" as ext4 journaling file system, check the "format partition" option and select "mount point" as /. Now click ok.
  • It will ready the partition for ubuntu installation. Now click on proceed button to proceed the installation process.