I'm having the same issue as everyone else. Was on the leaked 10147 build, so I couldn't update to 10159 through Windows Update. After reinstalling 10130 from the official iso (twice), I still couldn't get it detect an update in Windows Update. After looking around (which is easy), you can find the unofficial 10159 .iso that was created by conversion of the official .esd from Microsoft. Haven't had many problems with this unofficial iso, but I wouldn't expect any, as it's a direct conversion of the official .esd provided by Microsoft (which is now pulled, btw). Even Gabe Aul hinted at the ability to convert from an ESD to an ISO.
The only issue I'm having is that Windows is failing to activate (even using the new product keys). However, there aren't any limitations or warning messages associated with this, so I will just ignore it.