i have Dell I7, Inspiron 15, 5000 series, and i cant connect my wifi network after I changed the password of wifi router from the same laptop and it doesnt connect to only that network how can I fix it.
Is this a windows machine? Is it the router config page you can't connect to or the wireless network? If it's the router config page then clear your browser cache and try again, if it's the wifi network, go into wifi settings, manage known networks and "forget" the network and try and re-connect