By trying to combine the "subject" of your post and the extremely brief narrative of your post i think i know your question. So let me see if this is what you are trying to resolve.You have a laptop connected to a modem (assume it is a dsl modem) via a wireless router (which i assume is on the modem end).Though depending on your laptop you might be referring to something attached to the laptop. Most laptops have an internal wi=fi card but some may require an external wireless dongle. Now you want to connect a desktop additional computer to the system and be able to use the same modem wirelessly to make the connection. Is that what you are trying to do?truenorth