The other issue was, updating the browser. Everyone is used to browsers auto-updating these days, but this did not used to be the case. I am not positive, but I think Mozilla's browser, before it became FireFox, was the first browser to do this.
In the case of Internet Explorer (IE), not only did it not update, but any updates were tied to operating system updates. So not only did it not auto-update, but in the case of some older versions of Windows, you could not even install a newer version of IE. Edge, as mentioned was meant to clean this up, but even in the case of Edge, it could only run on Windows 7 or greater, so even though there was a newer browser, so many users were still stuck on versions on IE that were tied to the version of their operating system.
This is what brought on the push for the free Windows 10 upgrade a while back. They wanted to get everyone on the same version of Windows to hopefully solve that issue.
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