Photoshop / Wacom Tablet massive brush delay

My Wacom Intuos Pro tablet has massive lag when using Adobe Photoshop brushes.  I am using Windows 10 and the latest version of Photoshop.

I have to turn Windows Ink off as I get slider lag and unstable effects, it seems a well known issue.  I turn this off via Windows as well as via the Wacom interface by unticking the ''use windows ink option'' When I turn these options off my pen works but I have no pressure sensitivity at all.  A web search led me to insert a text code and save it into the Adobe Photoshop folder system - UseSystemStylus 0

This fixes the problem of conflict that seems to be between windows pen and the wacom but then I get severe lag on the brushes I use in Photoshop.  

I have removed and installed the drivers for the Wacom again, even reinstalled Photoshop again but to no avail.  Other programs work fine without delay, its just Photoshop.  

A fix for this issue would be great!