If you have a device connected to the Wi-Fi router, you can change the wireless password by following the steps below:
You will need your router's IP address. Typically, it is located under the router along with the username and password. If you are unable to locate it, follow these steps:
Open your command prompt (You can do this by typing cmd into windows search and clicking on the command prompt application)
Once open, type ipconfig and press enter
Look through the results and find your default gateway. This is your router's IP address.
Once you have located your router's IP address, open your web browser and put the IP address in the web address bar. This will bring you to a login screen where you will need to:
Enter your username and password. *You can find this underneath your router.
Once you are logged into the router, click on the wireless section, and then go through the settings until you see wireless security. Look for either a wireless passphrase or wireless security key. Next to these phrases is the Wi-Fi password.
Delete whatever is in the box and input your new password.
Before you click ok or save, please remember that once saved, all devices that are currently connected will need to re-connect with the new password.