Install Windows Embedded Standard 7 from USB

There is Microsoft's own tool called "Windows 7 USB/DVD Download Tool" for making bootable USB/DVD from ISO file. You can download it from Microsoft Store or CodePlex.

P.S. Although it has 7 in name, it works on anything higher than Windows XP SP2.

I see this kind of post throughout many forums. The tablets are 32 bit and DON't read the NTFS format either. It's as simple as that. The tool to make a bootable Windows X formats the key and makes it bootable yes but in NTFS. You need to copy all those files to a temp directory, reformat key in FAT32 then transfer them back. You will then be able to boot to the tablets and install whatever you want.