We did it. Thanks to all.  I had previously downloaded where Larry suggested. for Vista "Vista drivers listed for the E1405." Dell_multi-deviceA17-R174292.exe   I then went to the Device Manager and opened the Dell Wireless 1390 WLAN mini-card and reinstall the driver for it. When prompted where to search, I pointed it to the default unzip folder for the driver file. C:\dell\drivers\R174292.  Thanks Guys!
I reinstalled the OS on my Inspiron E1405 and recently went on a trip, I could not get on to half the networks I came across as I was using the Microsoft wireless connection utility. I want the one I had before, I think it is the Wireless Configuration Utility from Dell. Does anyone know where to download this, I have not been able to locate it. I am not looking for the Dell Wireless WLAN Card Utility, but the one that actually manages the wireless connections,  please.This unit has a Dell Wireless 1390 Mini-Card in it. 
Where can I download the Wireless Configuration Utility for my Inspiron E1405