Follow these instructions to remove or forget a wireless network on your devices:

Windows 10

1. Right-click the Network icon on the lower right corner of the screen (or click the Wi-Fi icon, select the network, and select disconnect). 
2. Click Network & Internet settings.
   
   
   
3. Click Wi-Fi and then click Manage known networks.
   
   
   
4. Click the network to remove or delete under the Manage known networks list, then click Forget.

Windows 8.1

1. Click the wireless icon in the system tray, then right-click the wireless network to remove, click Forget this network.
   
   

Windows 7

1. Open Network and Sharing Center, select Manage wireless networks on the left panel.
2. Right-click the network that is not connecting properly or the network to remove, and select Remove network. Confirm the right password when connecting.

1. Choose Apple menu  > System Preferences, then click Network.
2. Select Wi-Fi in the list on the left.
   
   
   
3. Click the Advanced button.
4. The Wi-Fi pane shows a Preferred Networks list. Select the Wi-Fi network that you want your Mac to forget.
   
   
   
5. Click the remove button (–) beneath the list. If you're asked to confirm, click Remove.
6. Click OK.
7. Click Apply.

1. Open Settings on your device, and tap on the WiFI icon to access WiFi network options.
2. Tap and hold the WiFi network you want to delete, then select Forget Network from the menu that appears.