I'm currently doing a spare-parts build to put a media computer in the living room, and having a devil of a time getting my Rosewill RNX-6300 wireless card to connect to my network.
I'm trying to set it up using Windows as opposed to the proprietary Rosewill software -- the Rosewill software is a little over my head.
To resolve this issue, disable 802.1X feature on your Windows computer.
Sometimes when the settings of the client device and the router don't exactly match, the client won't see the router's Wi Fi network.
Uncheck Varify the server’s identity by validating the certificate, then click the Configure button. Make sure the Automatically use my Windows logon name and password (and domain if any) checkbox is unchecked.