Ensure you are not trying to flash a BIOS meant for the dc5700 or dc5850. They are not interchangeable.
Improved recognition of 2GB and 4GB DDR2 modules. hp compaq dc5800 small form factor bios update
Updating a BIOS is a "high-stakes" task. A power loss during the flash can brick the motherboard. Ensure you are not trying to flash a
Download the (usually a .exe file like SP45511). Step 4: Installation Methods There are two primary ways to update the dc5800 BIOS. Method A: The Windows Utility (Easiest) This is best for users running Windows 7 or older. Close all open programs and disable antivirus temporarily. Run the downloaded .exe file as an Administrator . The "HP Firmware Update" utility will launch. Follow the prompts and click Update . Do not touch the PC until it restarts automatically. Method B: "Flash System ROM" (Safest) Updating a BIOS is a "high-stakes" task
It is normal for the fans to spin at 100% speed during the update process.
Note: The final and most stable version released for the dc5800 is typically . Step 2: Preparing for the Update