My partner's Computer is connect to internet and the network Icon shown on the taskbar is also shows it's working. He only use IE to connect to the Internet, nothing else.
Problem started when I install Kaspersky Internet Security on his computer. I try to active the software but it said check your internet connection.
I've downloaded Chrome to try visit some sites (IE still working, but I don't like to use it). After install Chrome, it's also cannot open any site and shown the problem with the DNS server (I use the Google DNS service 220.127.116.11 and 18.104.22.168).
I download Firefox also but again it's not working.
Additionally, I try to access the site "tinhte.vn" by enter the IP i got from Ping, both FF and Chrome show the Error from Cloudflare. Is there any explanation and solution for my case? Thank you.
The computer is Dell Inspiron One 2310 (AIO touch screen)