Watching you have but when installing the driver. If Avira or ZoneAlarm as antivirus / firewall installed, it is possible that the drivers are installed correctly ostensibly, the stick but can not find any wireless networks. That's because Avira and ZoneAlarm (possibly other programs of this kind) interfering with the driver installation.
To ensure that everything goes well, uninstall both programs, clean the registry with CCleaner for example, remove the faulty drivers installed in Device Manager, pull out stick and then start the PC. After restarting, just plug the stick, let driver from the CD or via Windows Update install. Then everything should go. If the drivers are once installed correctly, the antivirus software can be reinstalled.
