I am new to the Windows 10. Recently I used the Windows 7 OS. Now, I am not able to access the websites like https://www.cnet.com/ , https://www.techquintal.com , https://moz.com/ , etc. They are the websites that I used to visit more often. But now, it says, "Your Internet access is Blocked". Sometimes it also displays "Error establishing a DNS connection". I am using the Google chrome browser and almost all other sites are working fine.
Please help me to fix this as soon as possible. Also tell me if I revert back to Windows 7 can I fix the problem?