IT Support and Tech Blog

February 17, 2012   Posted by: JJ Fiasson

Fix iertutil.dll errors – Unable to locate component

Many of our clients have recently been experiencing an error where Windows shows up a message saying something like Explorer.EXE – Unable To Locate Component : This application has failed to start because iertutil.dll was not found. Re-installing the application may fix this problem. or ordinal 166 could not be located in the dynamic link library iertutil.dll. We have a few different things for you to try and fix the problem.

If you are having trouble following this guide or it’s simply not working, feel free to give us a call and we can come and solve the problem for as little as $99 (Australia – Sydney metro region only) – 1300 737 205 (7am to 9pm 7 Days)

Firs things first, here is a link to download a replacement copy of iertutil.dll – click here

What needs to be done to repair this error is to copy this file to the right location on your hard drive. Essentially a Microsoft update for Intenet Explorer 8 has deleted it. The issue is that you cannot access windows explorer to do so – and a portable USB stick will not be recognised by Windows.

The Simple Option

1. USB sticks won’t work, but a CD will! So burn the above linked iertutil.dll file to CD on a different computer.

2. Put the CD in the drive in the computer that has the iertutil.dll error on the screen.

3. Press CTRL-SHIFT-ESCAPE. You should get a task manager window.

4. Click File, Run. Type in “CMD” and hit Enter. You will be greeted by a command prompt.

5. You will need to figure out which drive your CD drive is. It may be D: or E: or F:. An easy way to figure this out is to try changing to that drive (type “D:” and hit Enter for example), then type “DIR iertutil.dll”. If the result is “No File Found” then you probably are not on the right drive.

6. Once you have located the file, we just need to copy it over. This is done by typing “COPY IERTUTIL.DLL C:\WINDOWS\SYSTEM32″

7. Reboot. All should be fine!

Another Option

1. If the above option didn’t work, something else you can try is using a web browser (not Internet Explorer).

2. On the computer that has the iertutil.dll error on the screen press CTRL-SHIFT-ESCAPE. You will get a task manager window.

3. Click File, Run, and type in “CMD” and hit Enter.

4. At the command prompt, type “CD \”

5. Then type “CD Pro” and hit TAB. This should complete the entry for you and say “CD\PROGRAM FILES” hit Enter.

6. Type “DIR M*” and hit Enter.

7. If you see Mozilla there, you are in luck. Type in “CD MOZILLA” hit Enter. Then “CD FIREFOX” hit Enter. Then “FIREFOX.EXE” hit Enter.

8. You will be in Firefox. Browse to this page and download the iertutil.dll

9. You will need to go back to the command prompt and move the file from your downloads folder to your WINDOWS\SYSTEM32 folder. This is done by browsing to your downloads folder (usually done by typing CD\USERS\USERNAME\DOCUMENTS\DOWNLOADS then Enter) and copying the file by typing “COPY IERTUTIL.DLL C:\WINDOWS\SYSTEM32″ then hit Enter.

10. Reboot. All should be good.

If all else fails

One other thing to try is booting off a Windows 7 Setup CD and using the recovery console to copy over the file from a USB stick. This can also work quite well. Good luck and post below if you’re still having issues!

Alternatively, feel free to give us a call and we can come and solve the problem for as little as $99 (Australia – Sydney metro region only) – 1300 737 205 (7am to 9pm 7 Days)