IE9 - Corporate applications - Warning! - Rollback to IE8

IE9, a more beautiful web...  But does it works?

Preamble, this rant starts with my frustration over a legacy 3rd party solution used in the company which works in IE8 but NOT in IE9.  No compatibility mode or anything like it will fix the JavaScript failures / misbehaviours produced after switching to IE9.  So be careful and test your legacy corporate applications prior to rolling IE9.

In my case I had the source code for the legacy ASP .NET application and gave it a try to solve the issue.  For me the problem was the interaction between ASP .Net UpdatePanel and JavaScript execution.  For a moment I was able to hack something out and get it working..... BUT!!!.... then an IE9 security update came in and whatever that did, it totally mess up the "hack / fix".  Since fixing it wasn't my job, I had to move on and wait for the 3rd party to come up with the IE9 update which of course they want to get paid for.

Meanwhile I have to roll back to IE8 because IE9 was pushed to me over updates.  To my surprise, IE8 is not supported for Windows 7. In order to roll back IE8 in Windows 7, you need to know the trick. 

From nquinnell:

1. Go to Control Panel, Uninstall Programs, then choose the option for Turn Windows Features On or Off.
2. Uncheck the box before Internet Explorer 9. Let it uninstall.
3. Go back to View Installed Updates on the left.
4. Scroll down to Microsoft Windows until you see Internet Explorer 9. Uninstall it.
5. Reboot.
6. Go back to Control Panel, Uninstall Programs, and choose Turn Windows Features On and Off. This time, instead of showing Internet Explorer 9, it will show Internet Explorer 8. Check the box.
7. IE8 installs. Reboot, and then put the icons back on your desktop.