1.Click on the link to download the package and select ‘Run’ or ‘Open’. You will be asked to accept the end-user license agreement (EULA) before you gain access to the package contents. The package contains 4 different files.
2.Pick a location where you would like to place the 4 files above by clicking on ‘Browse’. Once you have specified the location to place the extracted files, click ‘Ok’.
3.Launch an elevated command prompt from Start -> All Programs -> Accessories -> Right click on “Command Prompt” -> Run as Administrator. Type “CD” followed by the path where you have extracted the 4 files in step 2 above. 
4.In the command prompt, type “IE80Blocker.cmd /B” and hit enter to set the blocker on the machine.
5.You will see confirmation in the Command Prompt: “Blocking deployment of Internet Explorer 8 on the local machine. The operation completed successfully.” You can now close the Command Prompt window.