HP OneView for Microsoft System Center - Manual (Page 10)

6 Troubleshooting
Some drivers fail to be injected into the boot image
One of the reasons this might occur is that a driver is signed with a newer driver signing method
than that which DISM and the operating system support. In that case, the driver is treated as an
unsigned driver and is not injected into the boot image. For example, when running SCVMM 2012
R2 on Windows Server 2012, some Windows Server 2012 R2 drivers cannot be injected into an
x64 boot image. If the driver in question is not required for the environment, then do not include
that driver in the boot image.
10 Troubleshooting