zonycat, Below are some links that may help you get this resolved. You also can click the link below for upgrading using the Media Creation Tool. Nvidia Compatibility Issues with Windows 10 Windows Media Creation Tool Windows 10 Free Upgrade and NVIDIA Problems  
I am trying to do the Windows 10 upgrade from 8.1 on XPS 15 9530 and I get error: !Display: The Display is not compatible with Windows 10.  Check with the manufacture for support.  I have the latest Dell updates of the Nvida GeForce GT 750M and Intel HD Graphics 4600 for windows 8.1.  Per Dell the XPS 15 is supported for Win 10 and per Nvida, the GT 750M adapter is supported. Per the my Dell support page, there is a message I can go to Windows 10 (Your device is ready for Windows 10). How can I get Win 10 on the laptop?  I had tried it before and had same errors.  Time running out.
Win 10 Update does not happen for my XPS 15 9530 with Win 8.1