In the Windows operating system, you may get many DLL files that are responsible for the proper running of the computer’s applications and programs. These DLL files may get corrupt sometimes or removed from the computer accidentally. After this incidence, your computer gives you many problems including iertutil.dll is missing error in Windows. You will not be able to perform any function in your computer after the occurring of iertutil.dll was not found error. The situation is very much devastating and dreadful. So, it is very important to go through some manual procedures to fix the problem or you can also download and install Advanced System Repair tool in your computer to get rid of the situation automatically.