Return to Internet Explorer 6 from IE7
To uninstall Internet Explorer 7 to return to Internet Explorer 6 on Windows XP
Click "Start," and then click "Control Panel."
Click "Add or Remove Programs."
Check "Show Updates" at the top of the dialog box.
Scroll down the list and highlight the version of Internet Explorer 7 that you are running, and then click "Change/Remove."
Uninstall that,restart your PC and you are on IE6
http://msdn2.microsoft.com/en-us/ie/aa740486.aspx
How do I... Uninstall Microsoft Internet Explorer 7?
by Mark Kaelin | More from Mark Kaelin | 11/16/06
http://articles.techrepublic.com.com/5100-10877-6136194.html
Uninstall IE7
If your installation of IE7 was successful and uneventful, then uninstalling it is relatively simple process. The following steps will uninstall IE7 and restore IE 6.
1.Click Start, and then click Control Panel.
2.Click Add or Remove Programs.
3.Scroll down to Windows Internet Explorer 7, click it, and then click Change/Remove.
If for some reason Windows Internet Explorer 7 does not appear in the Add or Remove Programs you should:
1.Open Windows Explorer
2.Click Tools | Folder Options
3.Click the View tab
4.Make sure the radio button next to Show hidden files and folders is on
5.Click OK
6.Click Start, and then click Run
7.Type: %windir%\ie7\spuninst\spuninst.exe into the text box and click Enter
To uninstall Internet Explorer 7 and restore Internet Explorer 6 when using Windows XP or Windows Server 2003
1.Click Start, and then click Control Panel.
2.Click Add or Remove Programs.
3.Scroll down to Windows Internet Explorer 7, click it, and then click Change/Remove.
If you cannot find Internet Explorer 7 in Add or Remove Programs, click Start, click Run, type %windir%\ie7\spuninst\spuninst.exe, and then press ENTER.
Note: %windir% is the location of your Windows directory, which can usually be found at C:\Windows. To do this, you need to have "view hidden folders" enabled.
If you find yourself still needing help uninstalling Internet Explorer 7, check out the IE7 release notes found on the Microsoft MSDN Web site.