I hope the following information is helpful.
If you are trying to install the driver for the Broadcom ethernet NIC that was pre-installed (NOT an ethernet card that you purchased and installed yourself), there is a softpack (updated driver installation) download available from HP/Compaq. It will install the driver automatically for you, just download it from the link below and run the ".exe" file.
Check to be sure that your current Operating System, and model of the network device you are trying to install, are BOTH listed below BEFORE you download!
This is a software / driver update for the HP Compaq d530 ultra-slim desktop: All Models
Supported network devices:
Broadcom 10/100/1000 5782 based NIC
Broadcom 570x 10/100 Integrated controller
Broadcom NetXtreme Gigabit Ethernet 5782
Broadcom NetXtreme Gigabit Ethernet PCI-Express
NetXtreme(tm) 10/100/1000 Gb NIC
Supported Operating Systems:
Microsoft Windows 2000
Microsoft Windows 98
Microsoft Windows NT 4.0
Microsoft Windows Vista Business 32 Edition
Microsoft Windows Vista Business 64 Edition
Microsoft Windows Vista Enterprise 32 Edition
Microsoft Windows Vista Enterprise 64 Edition
Microsoft Windows Vista Home Basic 32 Edition
Microsoft Windows Vista Home Basic 64 Edition
Microsoft Windows Vista Home Premium 32 Edition
Microsoft Windows Vista Home Premium 64 Edition
Microsoft Windows Vista Starter 32 Edition
Microsoft Windows Vista Ultimate 32 Edition
Microsoft Windows Vista Ultimate 64 Edition
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional
Microsoft Windows XP Professional x64 EditionINSTALLATION INSTRUCTIONS:
1. Download the file by clicking the "Download" or "Obtain Software" button and
saving the file to a folder on your hard drive (make a note of the folder where
the downloaded file is saved).
2. Double-click the downloaded file and follow the on-screen instructions.LINK where file can be downloaded:HP/Compaq Support-Broadcom Driver download
Again, I hope this information is what you neededto install your network device. Should this not answer your question, please come back, provide more details of your problem, and we will be happy to help!Best of luck to you!