Microsoft Community Contributor
I am thinking they are locking down or using a different activation server. Even a Windows 8.1 Pro (authentic/genuine) license key will not work on a clean install of this build. I suspect this may be intentional, as this is close to being a release candidate (I think).It may be noted that 10147 is the only build which did not contain a License key.
Well, this would explain a lot since I cant seem to get build 10130 to upgrade on the fast ring to this build.We showed 10147 could be activated for a clean install if you had previously updated an activated version.
By associating it with your user account, they could control the update process eligibility for individual Microsoft account holders, as well as, potentially, system type. This would correspond with the "Windows as a Service" concept. For instance, it looks like updates will be rolled out very differently. This could be a way of taking advantage of the strong level of control that has manifested itself in the Windows Update process.Exactly how this might be involved with the final release, hard to say.