I have just tried to install elementary as a dual boot alongside windows 10 on my new XPS 15 and it was a bit of a train crash.
After some issues with Dell specifically, see here - elementary install freezing - I managed to get elementary to live load from the USB boot.
I then followed the install instructions and chose "something else" as the install option. I then added a root partition and a swap partition which I had freed up space for earlier on in windows 10.
All seemed ok but then when prompted to restart I clicked the restart button and everything just froze. I rebooted several times to have the same result.
So, I then tried deleting the partitions from windows. The main partition deleted fine but I could not delete the swap partition so on reboot I kept getting grub.
As a result I am doing a fresh install of windows to start from scratch.
The advice I specifically need and would appreciate help with is:
What happens if I choose 'install along side windows' rather than 'something else'?
How do I get rid of grub and the old partitions? My windows machine has just rebooted and grub again came up during one of the windows reinstall starts.
Has anyone else successfully got an XPS 15 running elementary alongside windows?