I'm trying to make a stock WinPE bootable flash drive to deploy a custom Windows 8.1 .wim file to some tablets. I've downloaded the Windows ADK and am following the instructions here: http://technet.microsoft.com/en-us/library/hh825109.aspx
My first problem is that makewinpemedia.cmd isn't in the same folder as the rest of the files and the command prompt was not able to run it. I eventually found it in c:\Program Files (x86)\Windows Kits but after running it I get "ERROR: Working directory is not valid: c:\winpe_amd64". I have followed the instructions on the library page exactly up to this point and can't find anyone else online with the same issue.
Thanks