Support Information:
Device Type: Network Adapter
Manufacturer: RealTek
Model: realtek 8139d
Interface: Parallel Port
Operating System: Windows XP Professional x64
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=1501&dp=2&qm0=realtek+8139d&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+Adapter++realtek+8139d+Windows+X P+Professional+x64+) | Research manufacturer RealTek (http://members.driverguide.com/index.php?action=getinfo&companyid=891)

Since Windows XP x64 is a fairly new os, I'd suggest checking the Realtek website (www.realtek.com.tw/downloads/downloads.aspx) to see if drivers are available and to be insured of getting the latest driver.