Yesterday, Microsoft released Windows 10 Build 17017 Build to Windows Insiders. It is the first RS4 build for Fast Ring Insiders and it comes with brand new features like Cortana Collections. Many Windows Insiders were facing issues in downloading this build yesterday. The update process got stuck at “An update is being prepared for your device….” stage for some users and c1900401, 80240034, 80070002 errors were shown for some users.
Windows team investigated the issue and has now fixed it. The packages that were made available for download were missing a component file that is required as part of the update process. They re-created the packages and re-deployed it to the update servers. If you were facing difficulties to download Windows 10 Build 17017 last night, try it again today.