Sorry mate, you most liekly got cards with Hynix Vram, 19 mhs is as high as they can go.

You can download the original iso from Microsoft.com and install without activating any license. You'll be able to use W10 indefinitely with irrelevant limitations.

To all of you wondering why you're getting 15 mh/s on ethereum out of the box with your 1060s 3G:

You got unfortunate enough to get gpus with Hynix memory which is very crappy for eth mining, instead of Samsung or Micron.

I got 4 MSI GTX 1060 3G ITX OC just yesterday and was very disappointed to see the Hynix name.

As far is I know there's no way to increase mining rates to Samsung levels, but I'd love to be proven wrong.

This coin has a very serious potential of mooning 10x, just buy and HODL if you don't hate money.