Internet Explorer updates using the Windows update feature. If you are regularly installing the latest Windows updates, you should have the latest version of Internet Explorer.
Windows 10 updates are always on by default. Microsoft Edge, which replaces Internet Explorer in Windows 10, is kept up to date automatically.
Download the latest version of Internet Explorer from the official Microsoft Internet Explorer download page: https://support.microsoft.com/en-ca/help/17621/internet-explorer-downloads