Below driver was tested & found working for a D-Link DWA-123 model wifi modem on Windows XP platform.
Click here to Download Driver
Steps to install driver -
- Download the driver file from download link shared & extract in a temporary directory
- Open Control Panel -> Administrator tools -> Device Management window
- In the list of hardware details , select 11n adapter , right click & select Update driver option
- Select option to choose driver file from a specified location . Point selection to temporary directory & proceed with installation.