Las primeras versiones de Windows (service packs) no soportan WPA2 y hay que instalar un "patch". Tal vez sea eso.
Update for Windows XP (KB893357).
Update for Windows XP (KB893357).
CitarThis update to Windows XP provides support for Wi-Fi Protected Access 2 (WPA2), which is the latest standards-based wireless security solution derived from the IEEE 802.11i standard.