Follow these steps:
1st step
Select Network and Internet from the Start menu, then select Network and Sharing Center.
2nd Step
Choose Manage wireless networks from the task list.
3rd step
Select the existing profiles in the Network table and click Remove.
4th step
If a caution dialogue box appears, simply click OK.
5th step
Then, under Network and Sharing Center, select Change adapter settings -> right-click Wireless Network Connection -> Connect/Disconnect.
6th step
To see accessible wireless networks, press the refresh button. Double-click or click the Connect button to connect to the network you want to connect to.
