Well, I ran it on my W7 i7 Vaio and it took the blink of an eye.
I'd already had one 'Threat' on my brand spanking new install. The S G download told me the current state of affairs. i.e., ready for upgrade.
MS hands out assurances like political promises - words to the effect this machine is suitable for W10 upgrade. Perhaps I could ask them to have the W10 drivers written, because as I've hollered, Sony are not going to.