So, after researching the error on the Win install it seems the most common cause of that error is having set-up a...

So, after researching the error on the Win install it seems the most common cause of that error is having set-up a dual Linux boot! Perhaps because when Win10 attempts to read the MBR, it can't read the format, hence the error message. So, I shall download, burn and try this. I seem to recall using it a few years back and it worked perfectly.

The usual routine is a) Install Windows first, then b) install Linux and a boot menu. This time around I might just do something different.
#Win10Install #MediaPC
http://linuxbsdos.com/2012/03/10/restore-the-windows-bootloader-to-mbr-after-dual-booting-with-linux/