WINPE 5.0 x64 USB Stick

I installed WINPE 5.0 on a USB Stick and it boots so far OK.

I expected following the description of the Workout of reboot.pro a mini Windows System, but what I got is in fact a Windows Explorer, which responds me after trying to do any Action allways " The Subsystem needed to Support the Image type is not present"!

What do/did I wrong, where can I get Information from, who to handle this WINPE to use it practicable ...???

Thanks a lot 

J.A. Sutter