Wireless network adapter - Vista

Question

I have a Compaq laptop (Presario V6215CA) that had a wireless adapter included.  It worked fine for months, then one day I opened it up and the wireless was gone.  I tried doing a system restore (a couple of times) and it failed each time I tried.  I checked for windows updates and there was nothing there. I dont see a separate wireless device in the device manager - not sure if it is the same as the wired LAN or not.   The network troubleshooter says I have no wireless device installed.Any ideas how I can get it back, or do you think the device is toast?