Trouble When Installing Ubuntu (Dual Boot)

Currently my os is Windows 8.1
I want to install ubuntu with my usb but Windows 8.1 isn’t detected
there’s just 2 option

i need help …
i’ve already disabled the secure boot

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Help me please thank you
i’m stuck…

I know this not the answer that you are looking for, but I would recommend going the VM route. Especially if using Xubuntu.