To use the Malware Block List on Microsoft DNS Server, you need to: 1) Download the file http://www.malware.com.br/mbl.dns and save it to %SystemRoot%\system32\dns 2) Modify mbl.dns file for your needs 3) Stop the DNS Service 4) Download the MBL in Microsoft DNS Server regedit format from: http://www.malware.com.br/cgi/submit?action=list_msdns 5) Make sure the downloaded file got a .reg extension 6) Double click the file and confirm the updates to your system registry 7) Start the DNS Service