With Windows 7 getting into the market and having a pretty strong presence users now have a very easy task of upgrading their browsers to Internet Explorer 9(IE 9) but just running the upgrade utility.
Microsoft says that users can very easily downgrade to their old browser version of IE anytime they want by simply uninstalling IE9 - how this can be done is by navigating to Control Panel >> Programs and Features >> click on View installed updates option where you will see an entry for Internet Explorer 9. Right click and select the uninstall option. This should easily remove the IE 9 version from your PC and restore the earlier version of the Internet Explorer browser.
Step 1: Type CMD in Start menu search box and simultaneously press Ctrl + Shift + Enter keys(This is used to launch the elevated prompt). Click Yes when you get the User Account Control (UAC) prompt. The other way of doing this is by going to Start >> All Programs >> Accessories >> right-click on Command Prompt entry and then click Run as administrator - this will also open the elevated prompt.
Step 2: In the command prompt, copy and paste the below command and then press enter key to execute the command.
FORFILES /P %WINDIR%\servicing\Packages /M Microsoft-Windows-InternetExplorer-*9.*.mum /c "cmd /c echo Uninstalling package @fname && start /w pkgmgr /up:@fname /norestart"
Step 3: You are done almost!! Just reboot your computer to completely uninstall Internet Explorer 9 from your PC.
Hope this helped - if it did let me know!!