Windows Server recently deployed to a customer site, client-server system with the 2012 R2 (not networked client-server). Before all on Windows Server 2008 deployment, the results encountered a problem record
In the final step of installation, need to select the alternate source, the mounting system used to find the file after decompression ISO / sources / sxs folders copied to the disk system, the alternate source point to the folder. Re-install.