I cannot find this driver.

Support Information:
Device Type: Network Adapter
Manufacturer: TP-LINK
Model: TP-Link 11b/g Wirless Adaptor
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=1721&qa5=12&qa7=1500&dp=3&qm0=TP-Link+11b%2Fg+Wirless+Adaptor&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=TP-LINK+Network+Adapter++TP-Link+11b%2Fg+Wirless+Adaptor+Windows+XP+Profession al+) | Research manufacturer TP-LINK (http://members.driverguide.com/index.php?action=getinfo&companyid=1721)

Tp-Link wireless adapter models all bear this format: TL-WNxxx

There is no such model as 11b/g... that's only a protocol.

Determine the actual model number of your adapter and click on the matching link:

http://www.tp-link.com/support/download.asp