What is iertutil.dll?

Iertutil.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. You can fix your iertutil.dll problem by downloading the correct iertutil.dll file. The following information can help you determine if iertutil.dll is a Windows system file or if it belongs to an application that you can trust.

Click to Run a Free Scan for iertutil.dll related errors

Iertutil.dll file information

The process known as Run time utility for Internet Explorer belongs to software Windows Internet Explorer or Microsoft Internet Explorer or Run time utility for Internet Explorer or Hotfix for Microsoft Visual Studio (version 2007) by Microsoft (

Description: Iertutil.dll is not essential for the Windows OS and causes relatively few problems. The iertutil.dll file is located in the C:\Windows\System32 folder or sometimes in a subfolder of "C:\Program Files" or in the C:\Windows folder. Known file sizes on Windows 10/8/7/XP are 2,006,016 bytes (21% of all occurrences), 267,776 bytes and 22 more variants. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The program has no visible window. There is no detailed description of this service. Iertutil.dll is not a Windows system file. It is a Microsoft signed file. It can change the behavior of other programs or manipulate other programs. Iertutil.dll is able to connect to the Internet, record keyboard and mouse inputs and monitor applications. Therefore the technical security rating is 43% dangerous, however you should also read the user reviews.

Uninstalling this variant: If problems with Internet Explorer occur, you can also visit the support page, update to a possibly corrected version or uninstall the software using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify iertutil.dll related errors

Important: Some malware disguises itself as iertutil.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the iertutil.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

here is a video about how to fix iertutil.dll.
  Lesly Jean pierre   (further information)
It isnt dangerous its just cpu greedy! follow these steps if you deleted or quaranteen it:- 1)let pc boot/and ur cursor is only thing visible on blue screen 2)press and hold ctrl/alt and delete(it should show few options) press few times if not! 3)start task manager:-goto top left in tsk mngr and click `file:new task(RUN)` 4)now in the`create new task option,click the `Browse file `button. before you search:click bottom bar and change from `programs to all files` click and navigate either to your desktop or C:\Program files..........and find your internet explorer browser shortcut. 5)enter in browser search bar `iertutil.dll` youll see a feww diff sites offering the download,probably a winzip/rar...... 6)goto your downloads file and copy the `iertutil.dll` ,using simular `task(run)option again navigate to C:\windows\system32` and paste it there....(if windows nt or 98 then go C:\windows\system or nt....paste 7)using `ctrl alt/delete` buttons again...get task manager up and top left click file(run task) .now just type into the box cmd 8)when the black Dos box appears....type `shutdown -r`(....without the `).. hopefully things be back to normal on reboot
  william whizz connor   (further information)
my AVG trapped a virus,had to act immediatly,since i removed the virus it also removed my iertutil.dll.
  Duane Roberts  
Fix for XP: Run task manager - new task - cmd (to run command window) - use DOS to copy iertutil.dll from c:\windows\system32\dllcache to c:\windows\system32....reboot...fixed!
Definitely critical for explorer.exe, mmc, and many other exectuables (anti-malware)
  Lee   (further information)
iertutil.dll is located in an update for microsoft service pack 3. This update tried to install Internet Explorer 8 on my computer ( i assume becasue i had removed it and installed IE7 a month ago) and when the computer restarted i had no desktop GUI. I could only run from my XP OS's task manager 's run command. I can get online becasue i have fire fox as a second browser. However anything needing the explorer.exe and iexplorer.exe will nto run. at all. iertutil.dll is crap, IE8 is crap..i am sick of microsoft updates poisoning my OS onc ei get it stable and free of thier malware and viruses.
it is run time utility file
  tanuj   (further information)
niertutil.dll is essential to access Internet Explorer
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of iertutil.dll: based on 20 votes with 9 reviews. 15 users think iertutil.dll is essential for Windows or an installed application. One user thinks it's probably harmless. One user suspects danger. 3 users think iertutil.dll is dangerous and recommend removing it. 7 users don't grade iertutil.dll ("not sure about it").

Do you have additional information?
What do you know about iertutil.dll:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving iertutil issues

A clean and tidy computer is the key requirement for avoiding problems with iertutil. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the iertutil.dll process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

iertutil.dll [all]