My system :
Processor Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz, 3301 Mhz, 6 Core(s), 12 Logical Processor(s)
Windows 10 64 bit Pro.
I had an install of the Intel Core OpenCL drivers that I was using with Luxrender - the graphics software.
I needed to uninstall it briefly due to some problems with old AMD drivers causing issues - AMD had not cleanly uninstalled all of it's gubbins - including their OpenCL driver.
Now if I go to 'Apps' in Windows 10 I can see that the Intel OpenCL driver is not present as expected.
But when I try to install the Intel Core OpenCL driver it's saying there is already a version on the PC when there isn't.
How can I fix this and install Intel OpenCL again please ?