Installing Microsoft Windows on an HP ProBook or EliteBook Notebook PC and creating an image

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The following errors may be displayed if a problem occurs when launching EFI and preboot
applications:
• Preboot partition not found: can’t find FAT32 partition starting with HP_TOOLS.
• Application not found: can’t find preboot application in directory.
• Invalid signature: BIOS fails to verify the signature of the preboot application.
If there is a backup version of the application in BIOS flash (for example, HP System Diagnostics).
BIOS will launch the backup. Otherwise, BIOS displays an error message.
WARNING
Do not encrypt HP_TOOLS partition using software encryption
programs such as Windows BitLocker or Full Volume Encryption for
HP ProtectTools. When the partition is encrypted, the HP preboot
applications cannot function.