Windows 10, Ubuntu 18.04 dual boot - hard disk not detected

[SNaveenMathew]

Hello,

I'm trying to install Ubuntu 18.04 and Windows 10 in parallel. I'm currently running Windows 10.

I faced issues at the "Installation Type" screen:
1) I did not find options such as "Install Ubuntu alongside Windows Boot Manager", ..., "Something else"
2) I created unallocated space using a disk manager. However, "Install Type" screen showed only the free space from pen drive that I used as boot device.

A parallel issue:
I found that all my partitions were 'Primary'. Most installation tutorials showed the target partition as 'Logical'. So I tried to create a partition with the unallocated space, but I was not able to change the type from "Primary" to "Logical". I'm cluelesss.

Any help is appreciated.

Thanks and Regards,
Naveen

[yancek]

I would suggest the first place to go is to the official Ubuntu documentation site explaining this process which is at the link below.

https://help.ubuntu.com/community/UEFI