wireless setup fails

I reinstalled Windows 7 64bit on an Inspiron 1749 with the intention of passing it on to a friend.  Mistake.  I am able to make an Ethernet connection to the internet but am not able to establish a wireless connection.  After tracking down all the missing drivers I was able to identify I now have 2 Network Adapters Intel Centrino Advanced N6200 AGN and Realtek PCIe GBE Family Controller.  I have a mystery Unknown Device under Other Devices with a yellow exclamation mark.  I tried to Analyze the system and get the Current Configuration from the Dell website but I just got an ongoing message that it was scanning for an hour.

My router is working fine with another Dell laptop and assorted devices.  This Inspiron was previously set up wirelessly with the router before I reinstalled Windows 7. Any ideas?