Problem:

When you boot your system, you get this:

Initializing Intel(R) Boot Agent CE v1.2.36
PXE-E05: The LAN adapter's configuration is corrupted or has not been initialized.
The Boot Agent canot continue.

Explantation :

This is due to Ethernet-EEPROM corruption.
You must reflash it to make your system working.

Solution:

1. Create a USB bootable drive
Download the attached file, extract it.
Plug an USB-drive in your computer, run HPUSBFW.exe.
Choose your USB drive, FAT32, select "Create a DOS startup disk" and select the folder where your files are. Click start.

2. Boot it
/!\ Press "Esc" key every time the PXE-E05 error appear.
Plug your USB drive.
Boot your target and open the BIOS (delete or F2 key)
Go to "Boot" with left and right key.
Make sure "USB KEY" is selected (it is if you have a number at the beginning). If not, select it and press x.
Make sure "USB KEY" is the first in the list. If not, select it and press + several time.
Save your configuration in the "EXIT" menu.
Your USB drive must boot now.
Type: IBAUtil.exe -DEFCFG

Your EEPROM is now reflashed. Unplug your drive and reboot.

IntelResetDriveKey.exe