The easiest and most common way for malware to enter a system is through the browser. Security leaks make it easy for hackers – especially if you are surfing with an old version, you are an easy target.
The comparative test result called ‘Web Browser Security – Socially Engineered Malware Protection’ shows that IE8 catches the most malware, and that Opera catches nothing.
NSS Labs is the leading independent security product testing and certification organization. But there are some questions regarding their test. You can read more about it at: tinyurl.com/c3hzme or at: tinyurl.com/cah4re
However, in my belief, this study only tested one aspect of browser’s security – the built-in Anti-Malware & Phishing filters. I think IE8’s Smart Screen filter feature makes it a more secure browser.