I need assistance with my Wi-Fi system! I am unsecured...and anyone can connect to my router. I have a wireless router connected to my router, and the server machine is Windows XP, but my girlfriends laptop is Windows Vista. I did everything right setting up the WEP, I think, and am left to conclude that XP and Vista aren't compatible for WEP use... I'm sure I'm wrong, so what can I do?