According to various web pages, orca.msi/orca.exe is primarily distributed as part of the Windows SDK.
I have Visual Studio 2015 Professional Update 3 installed. I h
I was able to successfully download and install it the following way:
Download the Windows SDK as ISO file
Right-click on the ISO file (*_release_WindowsSDK.iso
) and select "Mount"
Go to folder "Installers", find and extract "Orca-x86_en-us.msi" (drag and drop it to a local folder outside of the ISO)
Do the same with the 3 cab files listed below:
Double click the file "Orca-x86_en-us.msi", and Orca will be added to the Windows start menu.
NOTE: In the link provided above, you can find an archive of older, as well as newer Windows versions too - if required.