The last couple of weeks we've had this strange issue where both our PCs bring the wireless down when we sleep them. At first it was hers but then mine started doing it too. I don't remember off hand if shutdown causes the issue but I will try it later on. I don't think the router is the culprit, I've been running it for years with no changes except for the SSID every once in awhile. Both laptops are relatively new and both running 8.1 Pro with no issues. When the wireless goes out we have to reboot the router. Then it's back. Strange as hell.