Simple way to remove Comodo Secure Dns and restore your actual browsing experience.
it can be done in simple three steps:
1. Go to your active Internet Connection Status and click properties.
2. Now select, Internet Protocol Version 4 (TCP/IPv4) click properties.
3. You should see that “Use the following DNS servers” selected. Instead, select obtain DNS server address automatically and hit OK.
Now you have successfully removed Comodo Secure DNS
You can read how to re-add the comodo secure dns server addressess