HP removed many older product pages, but the DC5800 is still archived. Use the following direct path:
Legacy HP motherboards struggle to read large USB drives or drives formatted to NTFS/exFAT. Use a USB 2.0 drive under 8GB formatted strictly to FAT32.
The HP Compaq dc5800 Small Form Factor (SFF) reached its final verified BIOS update with version 1.60 (SoftPaq sp73863) HP Support Community
When you navigate to the drivers page, you are not downloading one single "BIOS.exe" file, but rather a series of SoftPaq packages. A verified user log from 2015 indicates you will find four distinct files: hp compaq dc5800 small form factor bios update verified
I recently had the need to update the BIOS on my HP Compaq dc5800 Small Form Factor PC. After searching through various HP support pages and forums, I was able to successfully update the BIOS to the latest version.
Format a small USB flash drive (16GB or smaller) to on a working PC.
Addresses issues with sleep, hibernation, and waking up. HP removed many older product pages, but the
HP Compaq dc5800 Small Form Factor (SFF) bios update to version
: Resolving issues when installing Windows 7 or Windows 10, such as hanging at the installation screen. Hardware Compatibility
Ideally 32GB or smaller, formatted to the FAT32 file system. The HP Compaq dc5800 Small Form Factor (SFF)
Older BIOS versions frequently cause ACPI errors or blue screens (BSODs) when attempting to install modern 64-bit operating systems like Windows 10 or recent Linux kernels (Ubuntu, Debian, TrueNAS).
Select the USB drive, choose the verified BIOS file, and confirm the update. Method B: Flashing via Windows
The HP dc5800 SFF is an old machine, and users often encounter specific hurdles during this process.