I am unsure if these two problems are related, but they happened at the same time so I believe it's worth mentioning.
I have a Gateway T-Series (Model no. T-1628, also Model no. W350A) with Windows Vista Home Premium. This happened randomly. I did not make any changes to the computer, install/uninstall anything, etc. I simply booted it up as I usually do to be greeted with the error message and no wireless capability.
At first, I tried to troubleshoot why there were no available connections on this computer, when I was using a different laptop on the internet right next to it with no problem. The troubleshoot said that my wireless capability was turned off, so I hit the shortcut keys for it (Fn, F2), which did absolutely nothing. I went into the Mobility Center, and the "Turn Wireless On" button was greyed out and unclickable. I went into device manager, and the Network drives were showing and they were up to date and seemed to have no error messages. I have tried restarting, refreshing the internet connection menu in the tray, and the things mentioned above multiple times with no success whatsoever.
I found that from time to time, the error message will not pop up upon startup, usually if I wait a little bit before logging on with my password, but no matter what I do it shows that I have no wireless capability and it will not let me change that.
Any help is greatly appreciated. Thank you!