I'm running SCCM2012 in lab environment. Software deployment was working perfectly, until I started to experiment with drivers and images. Newly distributed apps are huge, 7zip in DP content has over 2GB. During install client is downloading whole 2000MB, but after that app is deployed correctly. I've removed all content from DP, software library, deleted images and drivers, but problem still occurs. I suspect that CM includes system image into app while distributing content, but with no deeper knowledge I have no idea how to fix this.