In the worst case it could be malware
Fix – Your Internet Access Has Been Blocked | How to Fix | Solution
Sometimes when you try to open a website, your browser encounters a "Your Internet access has been blocked" error with an ERR_NETWORK_ACESS_DENIED error code. There are a few quick fixes that you can try to regain access to the Internet.
You may encounter this error for a number of reasons. In some cases, it could be as simple as a driver misbehaving. However, it could also be that your antivirus program’s firewall is blocking Internet access to suspicious websites, or an external factor such as websites being blocked by the network administrator.
In the worst case, your PC may be infected with malware or viruses that can change your network settings and give the error message "Your internet access has been blocked". In that case, you should scan your PC with Windows Defender or a good third-party antivirus software.
