On the bottom-right corner of your screen, click the 
network icon in the taskbar. In the list of available wireless networks, select eduroam.
Click the Connect Automatically option to allow your device to connect to the eduroam network automatically. Click Connect.
Enter your UWaterloo login credentials. Then, click OK. (Your username is your 8-character username, e.g. myuserna)
Username: username@uwaterloo.ca
Password: enter your password
Click Connect to connect to the eduroam network.
You will now be connected to the eduroam wireless network.