I had to do a bit of research to find the answer to this question so I thought I'd share my results. Due to our outdated mainframe systems, we need to downgrade IE9 to IE8 in order to stay compatible. We also needed to downgrade Java. In order to this on a new machine from Dell, I logged into the profile and did the following:
NOTE: before doing any of these steps it is highly suggested you install an alternate browser and backup your system.
Open the Control Panels
Click on Uninstall a Program in the category view
Click on View Installed Updates
navigate down to the Internet Explorer 9 update (near the bottom) - This is there on new systems
Double click to remove the update, say OK to the prompt
When the update has been uninstalled it will ask you to reboot, do so. After the reboot make sure you have IE8 which is located in c:\program Files (x86)\Internet Explorer.
Note that it is very important that the downgrade be done this way or you may lose all internet functionality. DO NOT use Turn Windows Features on and off!!! You can uncheck IE9 this way but it will not revert to IE8. If you follow the steps above after the reboot you will have reverted to IE8.