I want to download the ethernet driver

Intel Download Center

the link above is a download page of the drivers. Good Luck.

go to
http://support.dell.com/support/downloads/driverslist.aspx?c=us&cs=04&l=en&s=bsd&os=WW1&osl=en&SystemID=PLX_PNT_P4_GX260&catid=-1&impid=-1
choose network and download ethernet driver

You can get external USB ones which mean you don't need to open the case. i.e:
http://www.dabs.com/products/startech-com-usb-to-ethernet-network-adapte-5JSH.html?utm_source=google&utm_medium=product+search&utm_campaign=product+search
and
http://www.dabs.com/products/startech-com-usb-audio-adapter-sound-card-660M.html?utm_source=google&utm_medium=product+search&utm_campaign=product+search

Go to dells website and download it. Put it on a flash drive.

Hi
one thing with GX series is that there were multiple network adapters used. if this is the onboard i would try this driver from dell's site. 

http://support.dell.com/support/downloads/download.aspx?c=us&cs=19&l=en&s=dhs&releaseid=R54402&SystemID=PLX_PNT_P4_GX260&servicetag=&os=WW1&osl=en&deviceid=2811&devlib=0&typecnt=0&vercnt=1&catid=-1&impid=-1&formatcnt=0&libid=5&typeid=-1&dateid=-1&formatid=-1&fileid=64589

if you dont have internet access on your gx260, youll need to download to another computer and then transfer it by flash drive or external hard drive.

once you have the driver on your gx260, then;

1. If you installed any of the network management utilities from dells site, uninstall those.
2. in device manager, find your network card, click on it and then remove it from the device manager.
3. shutdown completely (not just a restart) and then power up. all the new hardware prompts to come up and hit cancel to any of them.
4. find the dell driver package R54402.EXE, from wherever you have saved it to on flash drive, external hard drive or gx hard drive. double click on it to run.
5. once the installation is finished, reboot again.
If this doesnt solve it then there are several other drivers, but this is the most commonly used one.
If you still have problems with it, then reply in here and can help you further.

Hope this helps. and if it does, please dont forget to rate.

www.dell.com/aupport. Wearch for your driver. download it.

go to www.pcpitstop.com have a free and complete computer scan performed. Get your complete report.

all drivers for your system can be found at this link below

http://support.dell.com/support/downloads/driverslist.aspx?c=us&l=en&s=gen&ServiceTag=&SystemID=PLX_PNT_P4_GX260&os=WW1&osl=en&catid=&impid

http://support.dell.com/support/downloads/driverslist.aspx?c=us&l=en&s=gen&ServiceTag=&SystemID=PLX_PNT_P4_GX260&os=WW1&osl=en&catid=&impid=

plz check the dell website for the drivers

Ricardo, here is your driver:
http://support.dell.com/support/topics/global.aspx/support/downloads/en/downloads_splash?c=us&l=en&s=gen&~mode=popup&file=58953