There are basically two way to manage your wireless networking:
- via Windows with the "Wireless Zero Configuration" service.
- via the third-party software provided with the wireless network adapter.
The problem can be that, if you're using Wireless Zero Configuration but still have the adapter's own software installed, each time the PC is booted the adapter's own software takes back control and disables the "Wireless Zero Configuration" service. The solution to that is to uninstall the adapter's wireless software so that it is installed with *DRIVERS ONLY*.
However, as far as I know, this situation of the "Wireless Zero Configuration" service being stopped only happens when the PC is booted; I haven't come across instances of the service stopping during the normal running of Windows.