Disable/Enable your Network Connection
This issue usually occurs after a successful connection to the wireless network has been established and the PC has either rebooted or gone into sleep or hibernate mode. It can be frustrating but there are simple ways to get rid of the error message and reconnect to your network.
One way in which you can quickly resolve the issue is to disable and re-enable your wireless connection.
To do this, go to Start > enter network connections in the search box and click the Network Connections item in the search results.
Next, identify your wireless network connection (in reality your wireless network card) and right-click the icon. In the context menu, select Disable. Wait a few moments for the card to be disabled, and then repeat the process, this time selecting Enable.
(Alternatively you can select the icon and choose Disable this network device from the toolbar, and use Enable this network device to re-enable it)
The wireless card should now be able to effortlessly connect to your intended wireless network.