I received this error attempting to install Visual Studio 2017 RC:
A product matching the following parameters cannot be found:
channelId: VisualStudio15.Release
productId: Microsoft.VisualStudio.Product.Enterprise
This can occur if you have a previous version of Visual Studio ’15’ installed. It can also occur if your version of Visual Studio ’15’ failed to install or uninstall completely.
I was able to get Visual Studio 2017 RC to install successfully by deleting the C:\Program Files (x86)\Microsoft Visual Studio folder. This ensured that the Visual Studio Installer correctly downloaded the new program files.
Hope this helps, happy coding.