Here are a couple of quick facts about Internet Explorer and malware as it hits this 1 billion blocks milestone:

•NSS Labs have recognized the Internet Explorer 8 SmartScreen® Filter as a leader in protection against Socially Engineered Malware in their August 2009 and March 2010 reports which compared Internet Explorer 8 to Chrome, Firefox and others.
•Our malware block rates continue to improve because we continue to improve the SmartScreen service back-end. For example, in August 2009 we had blocked about 70 million attempts to download malware or about 18 million blocks per month. At the time, according to Net Applications, about 15% of the internet population used Internet Explorer 8. In the last two months, we’ve blocked 100 million attempts to download malware. Last month, according to Net Applications, nearly 26% of the internet population uses Internet Explorer 8. There are 1.7 times more users on Internet Explorer 8 than August 2009 but we’re blocking 5 times more malware month on month.
Full read: Internet Explorer 8 SmartScreen® Filter Reaches Important Milestone