I would suggest you that how to change a wireless connection:, Although you are not a computer expert, you can also solve these problems.
1.Click Start button, choose and click Control Panel.
2.Find and click on Network and Internet.
3.Click on Network and Sharing Center on the right side.
4.Click on Change adapter settings on the left panel, enter Network Connection window.
5.Choose the Local Area Connection or Wireless Connection, right click to connect or disable.
How to check wifi connection