The HP EliteBook 840 G3 is a workhorse. In its prime, it was a business-class ultrabook—magnesium chassis, spill-resistant keyboard, and a 1080p display. But today, it’s a popular refurbished unit. And many of these units come with a hidden time bomb: a forgotten BIOS administrator password.

Answer your three personal security questions to reset the password. Contact HP Support (Official Path) : HP can provide a customized file specifically for your laptop's serial number: Reach out via the HP Contact Support page and ask to escalate the request for an SMC file. Once received, place the file in the root of a FAT32-formatted USB drive. Plug in the USB, and while booting, hold the Windows key + Up Arrow + Down Arrow System Disabled Code (Bypass Tool)

Do you have the or is the device still under an active warranty to assist with an official HP request?

If the HP BIOS password reset tool doesn't work, you can try using a third-party tool. One popular tool is . Here's how to use it:

Without this password, the laptop is not a laptop. It’s a brick. You cannot: