If by the off chance you are still using Microsoft’s Internet Explorer, you might be leaving a gaping hole in your computers security.

Internet security company ESET conducted a number of tests on the Windows OS to analyse the major vulnerabilities – and to no surprise really, Internet Explorer was the biggest culprit in leaving a number of areas unchecked.

“The number of exploit attacks on Microsoft components grew in 2014. The year was especially hard on users of the Internet Explorer browser, as Microsoft addressed twice as many vulnerabilities as in 2013. Fortunately for its users, a great number of these vulnerabilities were patched during the same year,” ESET said in a statement.

According to ESET, the biggest vulnerability in the net browser that was exploited in the wild is the Unicorn bug, as well as the BlackEnergy trojan that exploits a bug in Microsoft PowerPoint.

The information collected has been published in a report, which details “information about not just the main types of vulnerabilities present in Microsoft Windows over the past year, but also highlights the mitigation techniques that Microsoft introduced with the latest versions of its operating system.”

But if you are using the net browser, don’t feel too bad: according to the research and internet digging done by Net Market Share, almost 60% of internet users asked IE to do their searching and browsing in September last year.

The percentage of users have been steady for the last 12 months, indicating the users are pretty happy with what they are getting. There is a massive gap between top position and the rest of the pack, as the rest of the browser market share is made up of Chrome (21%), Mozilla’s Firefox (14.8%), and Safari (5%).