I need ethernet drivers for this desktop; however I dont know what network chipset this machine has. The ethernet drivers are not listed on HP's website for this model. Its the 725n desktop.

Support Information:
Device Type: Network Adapter
Manufacturer: Hewlett Packard (HP)
Model: 725n Desktop
Interface: Other
Operating System: Windows XP Professional
Age of Device: Not specified
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=456&qa5=12&qa7=1500&dp=3&qm0=725n+Desktop&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Hewlett+Packard+%28HP%29+Network+Adapter++725n+D esktop+Windows+XP+Professional+) | Research manufacturer Hewlett Packard (HP) (http://members.driverguide.com/index.php?action=getinfo&companyid=456)

That called "Pavilion 725n". And HP doesn't post any Ethernet drivers, ie:

http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=228&lc=en&cc=us&dlc=en&product=311249&lang=en

I suggest the following software:

To find make and model of pc hardware, EVEREST Home Edition is a free system diagnostics, system information program that will id most hardware onboard a mb. as well

as the actual motherboard.

http://www.softpedia.com/get/System/System-Info/Everest-Home-Edition.shtml

Alternate Everest download link: (offers 2 sites to dl program from)
http://www.softpedia.com/progDownload/EVEREST-Home-Edition-Download-16369.html

Run the program and then:

Click on Computer
Click on Summary
Right hand window (hardware) if the text is blue this is a link to the web site for that particular hardware.

If you have additional questions or need further help, please post a SUMMARY report from Everest.