Prajwal, I am not sure if I got this one, do you mean to 1. open "Deployment and Imaging Tools Environment" and run it as an Admin or the normal cmd ? 2. for command which I have to run because you mentioned "Copypd.cmd amd64 C:\Winpe" . I went even further and downloaded " adkwinpesetup" from Microsoft and re-run it again and but I got only (x86). Please advise?You can create a new boot image with waik, Waik installs with your your site server
Start "Deployment Tools Command Prompt" elevated.
Run Copypd.cmd amd64 C:\Winpe
You will now have a x64 bit winpe that you can import as a boot image in sccm.