You can download it directly from HP’s FTP server: https://ftp.hp.com/pub/softpaq/sp54001-54500/sp54033.html
Attach the SOP8 clip to the chip. Ensure Pin 1 (indicated by a red strand on the cable) aligns with the dot/indentation on the chip surface. hp compaq dc7900 bios bin file link
Double-click the downloaded .exe file. This usually extracts files to C:\SWSetup\spXXXXX . You can download it directly from HP’s FTP