Having recently jumped into the world of Windows 10 IoT the first stumbling point seems to be Installing an app (which has multiple dependencies) onto my Rasberry Pi 2 Model B using the AppX Manager.
In particular after selecting the AppX file, the Certificate and listing out the Dependencies I get the error:
Error source: <appx file>.appx
Error code: 0x80004005
The solution quite luckily is rather simple in that you should install the Dependencies using the AppX part of the Install app section first and then just install the .appx file and the certificate. See the screen shots below for more details…