It was the NVidia driver for me what fixed it in the end. I had the latest one at the time but this must have had a bug of some sorts in it.. Make sure you've got this driver version installed, 18.104.22.1689, and it should work fine.
I had the same issues for a couple of weeks and no joy in fixes, until one morning when windows asked my to update my Nvidia driver again, and it worked fine after that.
That being said, I could install all of the latest builds of the 3.1 version of the software fine with the bugged driver, it was only the 3.2 builds that didn't work for me.
Thanks for the swift response! I'll try to install that Nvidia driver.