So I bought a Wireless Adapter - but it is a 11MBPS and with WEP encryption. I don't know whether it could do with WPA - since if I buy a new Wireless Router I could be in big trouble because the network adapter doesn't support WPA. I heard that Windows has software based WPA for wireless adapters without WPA. Is that true? And in Wireless network system, with two computers and one server - could these wireless intruders outside enter the two client computers, or the server or both? If I have a good router, will it prevent the intruders from breaking into the system?