So far, since I've 'unlocked' it, very happy with the Lenovo, not least as despite its very modest spec, it's more than fast enough and it's not stretching its memory capacity in the least. Phew (for £240). Happy to see my excoriating review of the Fusion laptop 'go live' on Amazon.
I think the Lenovo is all up to date now, having updated the BIOS firmware today, and there are no Windows updates pending.
Ha - and I've just seen that the solution that worked for me has worked for someone else on the Lenovo forum who was tearing their hair out.