Is there any way to redownload Internet Explorer 7?

[mluvmusicm]

Alright, long story short, my internet randomly started messing up like, last week. Like, I couldn't add tabs. So tonight, I tried to download Internet Explorer 8 to see if it would fix the problem, but it just uninstalled Internet Explorer 7. So when I finally got my internet working again, it's really weird. It doesn't hvae the tab option, it doesn't say the page title at the top of the page, and I can't click on a link that will open up a window.
Is there any way to get my internet back to semi-normal?