First the obvious make sure the wireless card is on.
Second open the "Network sharing center" on the left click "Manage wireless" connections.
Remove your wireless network from the list.
Then let your wireless card discover your wireless network again.
If that does not work the Alien ware m17 uses an Intel WiFi Link 5300 I would get the latest drivers.
If that still does not work, I would call Alien ware for support and have them come swap out the wireless card