Internet Explorer 8's SmartScreen filter has blocked more than 1 billion malicious downloads.
"Our malware block rates continue to improve because we continue to improve SmartScreen service back-end. For e.g., 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 Apps, about 15% of the internet population used IE8. In the last two months, we've blocked 100 million attempts to download malware. Last month, according to Net Apps, nearly 26% of the internet population uses Internet Explorer 8. There're 1.7 times more users on IE8 than August 2009 but we're blocking 5 times more malware month on month," James Pratt stated.
If you've already upgraded, you can check that SmartScreen Filter is enabled by going to Safety Menu and clicking on SmartScreen Filter. If the menu tell you to "Turn Off SmartScreen Filter" the SmartScreen Filter is switched on.