Iertutil.dll Was Not Found in Acrobat

Installing Over Old Software
When you install a newer version of Adobe Acrobat over a previous version, it can sometimes cause a problem with Iertutil.dll, which is a Microsoft system file. This run-time utility is used by Microsoft Internet Explorer, and it resides in the Windows system folder. If you are experiencing this error, remove the newly installed version of Acrobat and install a clean version of Internet Explorer. When the Web browser is fully functional, reinstall Adobe Acrobat.
Internet Explorer Iertutil.dll File
The Iertutil.dll file is installed with Internet Explorer and it allows users to open up applications in browser windows. Microsoft is aware of issues between Internet Explorer 7 and 8 and certain programs, including Adobe Acrobat – the suggested fix is to install an updated version of Internet Explorer. A missing or corrupt Iertutil.dll can prevent Acrobat and other applications from running correctly while you are using Internet Explorer. Other issues with this file may show up as 'script' or 'run-time' errors when accessing Web pages that contain scripts.
Dynamic Library Link Files
DLL files are dynamic library link files that provide instructions for running Windows applications. The Iertutil.dll file can cause problems with other programs and websites that run scripts in Internet Explorer windows. One way to fix this is to access “Internet Options” within Internet Explorer by selecting “Tools” on the application toolbar, choosing the “Advanced Tab” and then adding a check mark to the three boxes that disable script checking and errors. Once you have a running version of Adobe Acrobat installed, uncheck the box in Acrobat that requires PDF files to display in a browser. Access this by selecting “Edit” from the menu, choosing “Preferences” and selecting “Internet.'
Errors Caused by Malware
Spyware, viruses and other types of malware can corrupt the Iertutil.dll file on your computer. If you suspect this may have occurred, run a virus scanner or download Microsoft’s Security Essentials virus detection program to identify and isolate the problem. This app is designed to work with Microsoft software and programs, and it is available as a free download.