|More details would be helpful - post is rather garbled. |
'He plugged in the telephone wire' - after you'd logged on the machine? (was this for a dial-up connection).
Normally if wireless network not present, you just get a cross on the wireless icon in the tray. Have you got another utility (ie, not windows) loking after your wireless connection? Did you get this popup after logging on, or during logging on (you hadn't ticked the 'log on using dial-up connection' box?)
Is it a purely personal laptop (ie, never member of domain at work)?
Can your son shed any light on it - just a normal telephone wire?