Question “Install alongside Windows 10” gone from Ubuntu installer

Aug 24, 2019
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I’m trying to install Ubuntu 18.04 alongside Win10, but after booting from the USB the option to install Ubuntu alongside the existing OS is gone.

I have shrunk existing partitions to create 90 GB worth of an unallocated space, which always did the trick. It doesn’t now: the option is gone.

Does it have something to do with the fact, that my disk has 4 partitions already? (c:/ windows 183 GB, 350 MB EFI System Partition, 619 MB OEM Partition and 202 GB Data partition, all preconfigured).

What do I do?
 

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