Support Information:
Device Type: Network Devices
Manufacturer: RealTek
Model: rtl8139d
Interface: Other
Operating System: Windows XP Professional
Age of Device: < 2 years old
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=891&qa5=12&qa7=1500&dp=2&qm0=rtl8139d&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=RealTek+Network+Devices++rtl8139d+Windows+XP+Pro fessional+) | Research manufacturer RealTek (http://members.driverguide.com/index.php?action=getinfo&companyid=891)

A forum is also for READING (not just posting). Please learn to use the tools we provide free to all our members. Search, Search
& Read, Read etc. both BEFORE posting a request that has been asked dozens of times and answered an equal number of times.

Take your choice:
http://forums.driverguide.com/search.php?searchid=258904

The there's our old faithful, the Advanced Search Wizard (members.driverguide.com/index.php?action=search&sm=e&qtxs=ndz&from_ums=1) for those toughies.

Then, of course, there's www.Realtek.com

It's quite apparent that you failed to do any homework on your own. Perhaps a language barrier?