Here's another potential solution that I've seen before:

Open your Network Sharing Center
Click on Manage Connections
Right click on the wireless connection you want to always be connect to
Click Properties
Click the Configure button you see on the first page

Click the last tab “Power Management” and make sure that both boxes are NOT checked. The first box was checked on mine (Allow the computer to turn off this device to save power). Therefore the connection would not save once the computer went to sleep because the computer was automatically disconnecting the wireless every time the computer would sleep). Since I disabled this I haven’t had any issues and my wireless internet stays connected all the time now.