Network adapter not present in device manager

Hello,

I have a Dell LATITUDE E5510 and I am running Windows XP on it (originally, it had windows 7 installed on it).

Since a few weeks back the icon for wireless connections is not showing on the network connections window anymore. If i go to the device manager, I can also not find it. I can stil connect to the internet using a network cable through my normal ethernet port . 

I have tried to use system restore tool of windows but had no success to go back to a configuration where my wireless works. I tried to install new drivers on this site but had no success. 

In the BIOS menu, my wireless is enabled.

What other options do i have? Can anyone help me with this? What more information would you like me to give you?

Thanks,

Mathias Schmidt