Hello,
I downloaded the Internet Explorer 7 Beta 1. I really didn't like it, so I uninstalled it. This left me with just Windows Explorer, not IE. When I try to install IE 6 now, it says I already have a newer version installed.
This is time sensitive.

Thanks.

Scroll down this page:

How to reinstall or repair Internet Explorer and Outlook Express in Windows XP

http://support.microsoft.com/kb/318378/EN-US/

To the section titled:

Windows XP and Windows XP SP1: Edit the registry and install Internet Explorer 6

Thank you. However, I can not locate the IsInstalled subkey.

I found the key and changed the value to 0. However, it still doesn't work

If sfc /scannow doesn't fix it I can only think of running a Repair Install of XP.

This will retain your files & programs & reload XP & IE.

You will then have to reload all Windows Updates & Service Packs.

Or try to reinstall IE7.

It is hard to tell the affect of Beta software on an Operating System.

Starting with XP IE became integrated with the Operating System.

It is not just something that can be uninstalled & reinstalled.