After flashing the generic .bin and confirming the PC boots, you must use HP DMI Tool (DMIEdit.exe or CPQTAG.exe) to restore your system information. Without this, HP Support Assistants and Windows licensing may fail.
and "Extract files..." to view the contents without running the installer. HP Support Community Installation Methods F10 Setup Flash: Copy the extracted file to a FAT32-formatted USB drive. Restart the PC, press to enter the BIOS, and select File > Flash System ROM Hardware Programmer: hp compaq dc7900 bios bin file link
Below are the info and exe file links to BIOS v1.26: * https://ftp.hp.com/pub/softpaq/sp54001-54500/sp54033.html. HP Support Community Solved: Questions on BIOS - HP Support Community - 7104667 After flashing the generic
Includes microcode updates for Intel Core 2 Duo and Quad-core processors to resolve initialization errors like "1801-Microcode Update Error". HP Support Community Installation Methods F10 Setup Flash: