ANSWERS: 1
  • Your Ad blocker or any client (e.g. your Web browser and the MS server) goes through the following cycle: Obtain an IP address from the IP name of the site (the site URL without the leading 'http://'). This lookup (conversion of IP name to IP address) is provided by domain name servers (DNSs). Open an IP socket connection to that IP address. Write an HTTP data stream through that socket. Receive an HTTP data stream back from the Web server in response. This data stream contains status codes whose values are determined by the HTTP protocol. Parse this data stream for status codes and other useful information. This error occurs in the final step above when the client receives an HTTP status code it recognises as '400'. So either check your hosts file or try a different browser. A malware scan would also help

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