Here they share a tip on solving issues with connecting to a wireless network:
Have you ever had issues connecting to a wireless network?
Last week I received a call from a client who was unable to connect to his own wireless connection at his business. He was 100% sure he was typing in the correct password for the wireless network but it just would not connect. Other users were able to connect and the wireless seemed to be working perfectly.
This can happen when a computer gets a little ‘confused’ resulting in the profile for the wireless connection becoming corrupt.
Here is what to do;
Windows 8 – click the wireless icon in the system tray (down by the clock), your list of available networks will appear from the right of the screen. Right click the wireless network you are having problem with and select ‘Forget this network’. Note – the network will not disappear. Now click on the network again, select Connect and type in the password.
Windows 7 – Right click on the wireless icon in the system tray (down by the clock) and select ‘Network and Sharing Centre’. On the left hand menu’s select “Manage wireless networks”, Right click the offending wireless network and select “Remove Network’. Now Left click the Wireless icon and reconnect to the network.