You do not need to download Internet Explorer as long as you have Windows 95 or higher. However, you can't install IE on any other software. Though, in 2019, IE is considered a downgrade more than it is an upgrade anyways. It was good from 1995- 2012, but now, is only slightly used for Google Hangouts, and NOTHING else. I would recommend using Microsoft Edge, a much faster browser than IE and even a little faster than Google Chrome. Though, IE is actually still a little faster than Mozilla Firefox. So if you had to choose between those two, I would recommend using IE.