Internet Explorer 9 is the recommended browser for Windows Vista.
Microsoft do NOT give you the ability to download the entire IE6 SP1 from their website. Instead they give you a 500KB exe file that you download and then run from your machine.
Looking for updates to Windows? As of November, Microsoft Windows Updates are now available for download from the Microsoft Update Catalog only. To open Internet Explorer 11 in Windows 10, in the search box on the taskbar, type Internet Explorer, and then s elect Internet Explorer in the list of results. Learn more about how to use Internet Explorer 11 in Windows 10.