Something that's missing on many current systems, especially laptops, is a disk activity indicator light. When you first get Windows 10 set up it may appear to be at rest at the desktop with no hourglass but I have found after many installs that a lot is going on in the background for quite a while. Even more if you upgraded from Windows 7 as OneDrive will consume resources while syncing to the cloud. I have seen systems take 20 minutes to completely calm down.
Patience grasshoppers.
Patience grasshoppers.