Daughter & boyfriend blended households. 2 computers, both running WinXP. 2 cable modems. One computer in living room, one computer in bedroom. Cable connections in both rooms. Both cannot be on internet at same time. Any reason why? I have set up a wired network at home using linksys and assume I can set up a wireless network for them by installing wireless in the older computer and purchasing a wireless router but wanted to make sure the current set-up is impossible before spending any more money. They're both college students, therefore POOR! Any help would be appreciated.