HP Compaq 6720s XP Driver Download

Chipset:

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&swItem=ob-52943-1&jumpid=reg_R1002_USEN

Sound Driver.

@first you have to install the UAA-Driver from:
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=321957&prodSeriesId=3355650&prodNameId=3355661&swEnvOID=1093&swLang=8&mode=2&taskId=135&swItem=ob-47284-1

and in the next step you should install the audio driver from:
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=321957&prodSeriesId=3355679&prodNameId=3355689&swEnvOID=1093&swLang=8&mode=2&taskId=135&swItem=ob-51896-1

or

UAA:

http://h10025.www1.hp.com/ewfrf/wc/genericSoftwareDownloadIndex?cc=us&dlc=en&lc=en&softwareitem=ob-47284-1&jumpid=reg_R1002_USEN

Audio:

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&swItem=ob-51896-1&jumpid=reg_R1002_USEN

Network

wired LAN driver in HP Compaq 6720s is Intel 82562GT 10/100 Ethernet Controller .

1.

Upgrade BIOS to F.09 by using the softpaq

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=321957&prodSeriesId=3442832&prodNameId=3442833&swEnvOID=2096&swLang=8&mode=2&taskId=135&swItem=ob-57447-1

2.
Install LAN using softpaq from

http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&ProductID=998&DwnldID=4275&strOSs=44&OSFullName=%20%20Windows*

Wireless:
These will get you basic functionality.
If your laptop is a "Centrino" it has Intel wireless by definition. Otherwise it likely has Broadcom wireless. Post back with the details and we can walk you through finding all the drivers. In general it looks like the hardware is the same as the nw9440 mobile workstation (other than video) which does have a full complement of XP drivers posted here because engineers who need to do serious 3D work often can't use Vista:

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=1839862&prodTypeId=321957&prodSeriesId=1839859&swLang=8&taskId=135&swEnvOID=1093