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1. Go to Start and right click Computer. Select and click Manage.
2. Computer Management window will appear. Under Services and Applications, select Services.
Note: Here is the other way to reach this Services: Start -> Control Panel -> Administrative Tools -> Services
3. Scroll down and select WLAN AutoConfig. Check whether it is started…
4. Double-click the service and its properties window will appear. If the startup type is not set to automatic, click on the dropdown arrow and change it to Automatic. Click Start to start the service if it’s not started. Click OK at last.
Note: If you don’t enable this feature, the Vista's Connect To window will not detect any wireless network. You need to use other wireless utility to do it.