Bootable Media Builder is a dedicated tool for creating bootable media. It is available in on-premise deployments only.
Bootable Media Builder is installed by default when you install the management server. You can install the media builder separately on any machine running Windows or Linux. The supported operating systems are the same as for the corresponding agents.
Why use the media builder?
The bootable media that is available for downloading in the backup console can be used only for recovery. This media is based on a Linux kernel. Unlike Windows PE, it does not allow injecting custom drivers on the fly.
32- or 64-bit?
Bootable Media Builder can be installed from both 32-bit and 64-bit setup programs. The bitness of the media corresponds to the bitness of the setup program. However, you can create a 32-bit WinPE-based media by using the 64-bit media builder, if you download the 32-bit plugin.
Please remember that in most cases you need a 64-bit media to boot a machine that uses Unified Extensible Firmware Interface (UEFI).