Sometime the best way to re-establish wireless connection, is to remove the old wireless network. For example, a change in Regent College wireless password, instead of re-enter the password, it would be better to remove previous wireless network and reconnect again.
For Windows 7
To remove wireless network, go to Control Panel
Click on Network and Sharing Center.
Click Manage Wireless Network on the left panel. Then select the wireless network and click remove.