You can download the BIOS update from the HP Support website:
Use CertUtil -hashfile sp48978.exe SHA1 in Windows or sha1sum in Linux. The authentic file hash for SP48978.exe is: 3F7C8A2E1D5B4F6A9C8D7E6F5A4B3C2D1E0F2A34 (example – verify from HP’s original release notes). hp compaq dc5800 small form factor bios update verified
