The install instructions do note an issue you may encounter during setup:
NOTE: There is currently a known issue with the ASP.NET 5 RC installer. If you run the installer from a folder that contains previous versions of the MSI installers for DNVM (DotNetVersionManager-x64.msi or DotNetVersionManager-x86.msi) or the ASP.NET tools for Visual Studio (WebToolsExtensionsVS14.msi or WebToolsExtensionsVWD14.msi), the installer will fail with an error “0x80091007 - The hash value is not correct”. To work around this issue, run the installer from a folder that does not contain previous versions of the installer files.
But actually, I encountered a different issue:
Looking through the logfile, we had a few of these entries:
Acquiring package: WebToolsExtensionsVS14, payload: WebToolsExtensionsVS14, download from: https://go.microsoft.com/fwlink/?LinkId=691117
Error 0x80072f08: Failed to send request to URL: https://go.microsoft.com/fwlink/?LinkId=691117, trying to process HTTP status code anyway.
Not sure if it was a proxy issue, but luckily I've found another way, firstly:
Run the installer from a new folder or locate existing instances of
WebToolsExtensionsVWD14.msiand delete them.
If you run into the issue above
Unspecified error, you can download and install the packages manually
Try running the installer one last time it has further work to do with product configuration and registry settings.
And then after, ensure your DNVM is upgraded by running
dnvm upgrade from a command prompt.
global.json changes, don't forget to check the aspnet/Announcements repo for the list of breaking changes (filter to