Try enabling the Delivery Optimisation for feature and cumulative updates, through Windows Update. Limit the P2P to your local network.Installed on two machines here went well on one but took 4 and a half hours on the other, but at least i got it done.
https://redmondmag.com/articles/2016/08/16/windows-10-p2p-update-controls.aspx?m=1
https://privacy.microsoft.com/en-GB/windows-10-windows-update-delivery-optimization
