1) What is your location? VA USA
2) What IP set are you using? DNS Servers 198.153.192.40 and 192.153.194.40/198.153.192.50 and 198.153.194.50/198.153.192.60 and 198.153.194.60
3) Please attach a screenshot of the Malware blocking issue. Messed up websites, i.e. facebook, nfl.com images on many sites, Windows Update not working. There are too many sites to list. Missing images broken images etc.
4) Please post a link to the Malware blocked page. There should be a "detailed report" link on this page that I would like to see.
Too many to list but changing DNS servers to Comodo's fix everything, so it is definitely your DNS servers.
Let me know if you need any further information, this is effecting many clients I have.