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I want to dual boot windows 10 and ubuntu but I can't see the option to install alongside windows 10 during ubuntu installation. Yet ubuntu installer recognizes windows 10. My pc has 4 partitions. Please help

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You need unallocated space for that option to show.

If you do not have that you will need to shrink one of your partitions (to the size of the Ubuntu installation you want to use; at least a minimum of 30Gb).

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  • Thanks i deleted my drive D and had unallocated space and the option was available.Thanks a lot – user864758 Aug 7 at 11:49
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You also need to have a Windows installation that does not use up all the Primary partitions, none of which is an extended partition. I hit this recently trying to do an install. To put it another way, you must have: Either:

  1. three or fewer Primary partitions, or
  2. One of your Primary partitions must be a container for extended partitions.

Or you have to re-arrange things to meet these requirements.

Martin

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  • Recent OSs use GPT which does not have any concept of Primary/Extended partitions. – turbulence Aug 18 at 18:31

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