No luck with the above but I went back to the orginal software that came with the PC, Windows 7 Home Premium only to find out it can't be installed from a CD! No device drivers
was the message after I chose my region from the install screen. After some short research, I prepared a USB stick with the software and booted with this and Windows is now installed.
What a nightmare of a computer!
Thanks for the help given. It spurred me on to get this finally resolved.