I would like to dual boot KDE neon alongside Windows 10, although that option isn't listed in the menu. I don't know how to use manual mode, sadly.
I would like to get neon on this unallocated space:
http://i.imgur.com/mzpFdXe.png
How would I do that?
Thanks.

KDE Neon is Ubuntu, and you can easily find plenty of tutorials on how to dual boot Ubuntu with Windows online, depending on your computer specs and desired setup. There are even more tutorials on how to properly partition your disk for Linux.

anewuser wrote:KDE Neon is Ubuntu, and you can easily find plenty of tutorials on how to dual boot Ubuntu with Windows online, depending on your computer specs and desired setup. There are even more tutorials on how to properly partition your disk for Linux.

Not entirely true, installer is not the same, option resize partition and use free space is gone. Anyway what kind of answer is: you have plenty of tutorials? Maybe it will be a shock for you, but everyone is heard about google. Either help the man or keep away.
Sadly, but Kubuntu looks like a better option for now.

First of all you need to make room on your HDD for linux. You can use installer to resize windows partition or you can do it from windows.
Second is to create partition for linux in the free space. First partition should be created as primary, Ext4, mount point /. Second partition is logical, swap area.
Select Ext4 partition for installing linux, and note that bootloader should be installed on sda usualy (your HDD) with all partitions.
Here is installation with windows 7 and ubuntu process is the same https://www.youtube.com/watch?v=0W7XYAB4cLc