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I'm trying to dual boot my Dell XPS 15 7590 running Windows 10 Pro with Ubuntu 18.04. After booting the live USB with try Ubuntu without installing or install Ubuntu I cannot actually install the OS.

I'm using a 8 GB USB stick, but I cannot select the 128 GB partition I created before. I could only select the language and keyboard layout before this error message shows up:

You need at least 8.6 GB of free space to install Ubuntu. This computer only has 8.0 GB.

Any idea what I could have done wrong?

zx485
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Garben Tanghe
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  • This link might help. https://askubuntu.com/questions/978269/usb-tries-to-install-onto-itself-dual-boot-with-win10?rq=1 – crip659 Sep 02 '19 at 21:43
  • Aah, yes indeed. The SATA setting in the boot menu had to be set to AHCI. Thanks a lot! – Garben Tanghe Sep 02 '19 at 22:25
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    Possible duplicate of [USB tries to install onto itself (dual-boot with Win10)](https://askubuntu.com/questions/978269/usb-tries-to-install-onto-itself-dual-boot-with-win10) – karel Sep 02 '19 at 22:27
  • Think there is a line in the link that windows won't be happy. Just something to be aware of. – crip659 Sep 02 '19 at 23:17
  • Windows was indeed not booting up after changing to ACHI, I followed this link to get around it: https://support.thinkcritical.com/kb/articles/switch-windows-10-from-raid-ide-to-ahci – Garben Tanghe Sep 03 '19 at 16:16

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