MY compuer was fine until I downloaded Internet Explorer 7?

[Hello]

I recently downloaded Internet Explorer 7 (I used ot have Internet Explorer 6), however, my internet now is extremley slow and sites are always freezing. I tried downloading Internet Explorer 6 again, however it won't let me since I have the latest version. Does anyone know what I can do?

P.s. I downloaded it from their website

 

[pink_pop_can]

dont use IE
use Firefox
its amazing


http://www.download.com/mozilla-firefox/?tag=mncol