This week, I was trying to install Windows 8.1 with SCCM2012 R2 over the network. But after enabling PXE on the laptop, I came across this message : Succeed to download NBP file but the boot process continue over the Hard Disk Drive instead of PXE.
To solve this, I enabled Legacy mode in the Bios instead of UEFI mode.
After that, it worked !
UEFI mode Vs Legacy mode : https://technet.microsoft.com/en-us/library/hh825112.aspx
