There will be a situation where a windows computer cannot able to connect to a wi-fi network, usually with an error message ‘unable to connect to this network’ . The basic troubleshooting is to try deleting wireless profiles/networks that are already stored on a computer.
Windows XP /Vista /Windows 7/ Windows 8.1/ Windows 10
Deleting wireless profiles is straightforward on Windows 10.
Step 1: Click on the windows logo and click on Settings (gear icon)
Step 2: Click on Network & Internet
Step 3: Click on Wi-Fi on the left and select ‘Manage known networks’
Step 4: Select your current Wi-Fi network name (or your previous network names) and click on ‘Forget’
To make your iphone/ipad forget your connected wifi network
Step 1: Click on Settings, Wi-Fi
Step 2: Tap on the desired Wi-Fi name
Step 3: Click on ‘Forget This Network’ to remove the Wi-FI name from the device. (If your device Wi-Fi credentials is not saved, you will not see the ‘forgot this network’ option)
Then try re-connecting to the wifi network, ios device should ask for password to connect.