Without calling Dell Support, I was able to suppress the message, just not exactly how I wanted to. Having already installed the Dell WLAN Card Utility, I did download and install the Dell ControlPoint System Manager, followed by the Dell ControlPoint Connection Manager. After installing connection manager, I no longer get the prompt each time I log in. It still would be nice to simply use the WLAN Card Utility in totality without the dependence on the ControlPoint. Together however they seem to work well. By clicking Start-> Programs-> Dell ControlPoint-> Connection Manager-> Dell ControlPoint Connection Manager, I am able to tweak settings as needed, run diagnostics, and view connection status/details. I guess I can put this issue to rest. 
I have a Latitude E6400 that I had to rebuild due to a hard drive failure, with a Dell 1510 WLAN card installed. Upon reinstalling the Dell WLAN Card Utility however, I now receive the following prompt every time I log into my machine:   “Reminder: The Dell Wireless WLAN Card is still disabled. Slide the Wireless ON/OFF switch to enable it.”   I am able to connect to wireless networks without any issues, and when enabled it works great. I do however like to keep my wireless radio off when I am not using it. I certainly don’t need the software to tell me that my WLAN card is disabled when I already know that it is. How do I disable this message from coming up each time I log in? I don’t see any options in the software to simply disable reminders, however I don’t want to disable the software from loading altogether. I just don’t need it telling me something I already know! Thanks for any help you can provide.
Dell Wireless WLAN Card Reminder at Login