Why would my laptop connect to my home wireless network one day then not be able to find it then next?

My laptop senses other wireless networks in the neighborhood, AND a different laptop sense my home network. What gives? I'm using a linksys N-Router and I have a Dell E1505.

Public Comments

1. Have you been using the unit on another network? If so, it will sometimes not clear when restarted. You may have to do a repair. Right click on the wireless icon in the taskbar and select repair. If that isn't an option ,Start/Run/type cmd. In the window that opens, type ipconfig /release. After it answers, ipconfig/renew. Should give results with new address from your router.
2. Throw your computer away and buy a type writer....