This fix completely stabilised the running of Cubase 8 Pro on my computer.
I changed the SATA ( Hard Disk ) controllers on the machine from IDE to AHCI via the machines BIOS.
Cubase 8 Pro now runs very smoothly on the computer.
I followed these instructions on how to change SATA controllers from IDE to AHCI : Neowin Guide: How to change from IDE to AHCI without reinstalling Windows - Neowin
Hope this helps any one who has had the same issue.