|Not sure I understand "a new wireless pc"… do mean a new wifi router?|
Your wife's computer (presumably a laptop) - is it part of a domain at work, or just a more simple peer-to-peer network?
Does your wifi router broadcast its SSID (the name that identifies it)?
Does your router use any level of security - at the least an access key?
Can you see the available wifi routers in your immediate locale on your wife's laptop; and is yours one of them?
What make/model laptop; what make router?
message edited by trvlr