# SUM and SPP boot environments

The USB Key Utility does not support multiboot setups on a single device. The SUM and SPP ISOs contain signed parts to work with the UEFI bootloader. The signed parts do not allow for multiboot setups on a single device, such as a USB key. You can download the SPP at https://www.hpe.com/servers/spp/download.

The following sections discuss deployment from SUM. For more information on planning an update, see the SUM Best Practices Guides available on the Hewlett Packard Enterprise website.