Trend Micro Trend Micro Antivirus Plus Security DLL iau.dll

Repair DLL Errors: Iau.dll Download and Update

Last Updated: 11/25/2023
[Time to Read: ~3-5 minutes]

Trend Micro ActiveUpdate Module files, such as iau.dll, are considered a type of Win64 DLL (Dynamic link library) file. They are associated with the DLL file extension, developed by Trend Micro for IAUSDK.

The first release in the Windows 10 Operating System for iau.dll was on 09/10/2019 inside Trend Micro Maximum Security 16. The most recent release for Trend Micro Antivirus Plus Security 16 launched on 09/10/2019 [version 6.9.0.1062 release].

Please continue reading to find your correct iau.dll file version download (free), detailed file information, and DLL file troubleshooting instructions.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	iau.dll
File Extension:	DLL file extension
Description:	Trend Micro ActiveUpdate Module
Object File Type:	Dynamic link library
File Operating System:	Win32
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Trend Micro Inc.
Software Program:	IAUSDK
Legal Copyright:	Copyright (C) 2019 Trend Micro Incorporated. All rights reserved.

File Details
Character Set:	Windows, Latin1
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x0017
Entry Point:	0x65d10
Code Size:	652800

View Other iau.dll Information

File Info	Description
File Size:	1033 kB
File Modification Date/Time:	2019:11:25 13:15:15+00:00
File Type:	Win64 DLL
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2019:04:26 03:24:20+00:00
PE Type:	PE32+
Linker Version:	11.0
Code Size:	652800
Initialized Data Size:	404480
Uninitialized Data Size:	0
Entry Point:	0x65d10
OS Version:	5.2
Image Version:	0.0
Subsystem Version:	5.2
Subsystem:	Windows GUI
File Version Number:	6.9.0.1062
Product Version Number:	6.9.0.1062
File Flags Mask:	0x0017
File Flags:	(none)
File OS:	Win32
Object File Type:	Dynamic link library
File Subtype:	0
Language Code:	English (U.S.)
Character Set:	Windows, Latin1
Company Name:	Trend Micro Inc.
File Description:	Trend Micro ActiveUpdate Module
File Version:	6.9.0.1062
Internal Name:	Trend Micro ActiveUpdate Module for WINDOWS-X64-RELEASE
Legal Copyright:	Copyright (C) 2019 Trend Micro Incorporated. All rights reserved.
Product Name:	IAUSDK
Product Version:	6.9
Legal Trademarks:	Copyright (C) Trend Micro Inc.
Private Build:	Build 1062 - 4/26/2019

^✻ Portions of file data provided by Exiftool (Phil Harvey) distributed under the Perl Artistic License.

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What are iau.dll Error Messages?

Dynamic Link Library iau.dll Errors

iau.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like iau.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like MpSigStub.exe - to follow. These files were created so that multiple programs (eg. Trend Micro Antivirus Plus Security) could share the same iau.dll file, saving valuable memory allocation, therefore making your computer run more efficiently.

Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared DLL file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when iau.dll is attempted to be loaded either when Trend Micro Antivirus Plus Security is starting up, or in some cases already running. Some of the most common iau.dll errors include:

Access Violation at address - iau.dll.
iau.dll could not be found.
Cannot find C:\Program Files\Trend Micro\AMSP\update\iAU_SDK_Backup\iau.dll.
Cannot register iau.dll.
Cannot start Trend Micro Antivirus Plus Security. A required component is missing: iau.dll. Please install Trend Micro Antivirus Plus Security again.
Failed to load iau.dll.
The application has failed to start because iau.dll was not found.
The file iau.dll is missing or corrupt.
This application failed to start because iau.dll was not found. Re-installing the application may fix this problem.

Your iau.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Trend Micro Antivirus Plus Security), or deleted by a malware infection. Furthermore, iau.dll file corruption could be caused from a power outage when loading Trend Micro Antivirus Plus Security, system crash while loading iau.dll, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

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How to Fix iau.dll Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your iau.dll issue. These troubleshooting steps are listed in the recommended order of execution.

Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
When you see the search box, type "System Restore" and press "ENTER".
In the search results, find and click System Restore.
Please enter the administrator password (if applicable / prompted).
Follow the steps in the System Restore Wizard to choose a relevant restore point.
Restore your computer to that backup image.

If the Step 1 fails to resolve the iau.dll error, please proceed to the Step 2 below.

Step 2: If recently installed Trend Micro Antivirus Plus Security (or related software), uninstall then try reinstalling Trend Micro Antivirus Plus Security software.

You can uninstall Trend Micro Antivirus Plus Security software by following these instructions (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
In the search box, type "Uninstall" and press "ENTER".
In the search results, find and click "Add or Remove Programs"
Find the entry for Trend Micro Antivirus Plus Security 16 and click "Uninstall"
Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Trend Micro Antivirus Plus Security software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Trend Micro Antivirus Plus Security 16

Trend Micro

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many iau.dll error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

Hit the Windows Start button
In the search box, type "Update" and press "ENTER".
In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
If updates are available for download, click "Install Updates".
After the update is completed, restart your PC.

If Windows Update failed to resolve the iau.dll error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

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If Those Steps Fail: Download and Replace Your iau.dll File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate iau.dll file version. We maintain a comprehensive database of 100% malware-free iau.dll files for every applicable version of Trend Micro Antivirus Plus Security. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download iau.dll Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy this file to the appropriate Trend Micro Antivirus Plus Security folder location:

Windows 10: C:\Program Files\Trend Micro\AMSP\update\iAU_SDK_Backup\
Windows 10: C:\Program Files\Trend Micro\AMSP\update\iau_sdk\
Windows 10: C:\Program Files\Trend Micro\AMSP\update\iAU_SDK_Backup\
Windows 10: C:\Program Files\Trend Micro\AMSP\update\iau_sdk\
Windows 10: C:\Program Files\Trend Micro\AMSP\update\iAU_SDK_Backup\
Show 1 more directory +
Windows 10: C:\Program Files\Trend Micro\AMSP\update\iau_sdk\
Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve iau.dll problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

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Download iau.dll Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying iau.dll to your appropriate Windows system directory. Trend Micro typically does not release Trend Micro Antivirus Plus Security DLL files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing iau.dll and all other DLL files for Trend Micro Antivirus Plus Security. An incorrectly installed DLL file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Trend Micro Antivirus Plus Security 16

File Name

Software Version

File Version

Architecture

iau.dll

6.9.0.1062

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	IAUSDK
Software Version:	6.9.0.1062
File Version:	6.9.0.1062
File Size:	1058296
File Date:	11/25/2019
MD5 Checksum:	9b15e719a85bfb43ea905cdcb300fc2f
SHA1 Checksum:	b18ab0980e19130b444f6b9cc6d2ac3a40b821d6
SHA256 Checksum:	3fe2106c99bae6419bd89349c65f27d3de5dc09bf138374791e766148fbe4d89
CRC32:
File Directory Location:	C:\Program Files\Trend Micro\AMSP\update\iAU_S ... C:\Program Files\Trend Micro\AMSP\update\iau_sdk\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	0.0
Initialized Data Size:	404480
Linker Version:	11.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	5.2
File Modification Date/Time:	11/25/2019

Trend Micro Internet Security 16

File Name

Software Version

File Version

Architecture

iau.dll

6.9.0.1062

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	IAUSDK
Software Version:	6.9.0.1062
File Version:	6.9.0.1062
File Size:	1058296
File Date:	11/25/2019
MD5 Checksum:	9b15e719a85bfb43ea905cdcb300fc2f
SHA1 Checksum:	b18ab0980e19130b444f6b9cc6d2ac3a40b821d6
SHA256 Checksum:	3fe2106c99bae6419bd89349c65f27d3de5dc09bf138374791e766148fbe4d89
CRC32:
File Directory Location:	C:\Program Files\Trend Micro\AMSP\update\iAU_S ... C:\Program Files\Trend Micro\AMSP\update\iau_sdk\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	0.0
Initialized Data Size:	404480
Linker Version:	11.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	5.2
File Modification Date/Time:	11/25/2019

Trend Micro Maximum Security 16

File Name

Software Version

File Version

Architecture

iau.dll

6.9.0.1062

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	IAUSDK
Software Version:	6.9.0.1062
File Version:	6.9.0.1062
File Size:	1058296
File Date:	11/25/2019
MD5 Checksum:	9b15e719a85bfb43ea905cdcb300fc2f
SHA1 Checksum:	b18ab0980e19130b444f6b9cc6d2ac3a40b821d6
SHA256 Checksum:	3fe2106c99bae6419bd89349c65f27d3de5dc09bf138374791e766148fbe4d89
CRC32:
File Directory Location:	C:\Program Files\Trend Micro\AMSP\update\iAU_S ... C:\Program Files\Trend Micro\AMSP\update\iau_sdk\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	0.0
Initialized Data Size:	404480
Linker Version:	11.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	5.2
File Modification Date/Time:	11/25/2019

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Files Related to iau.dll

DLL Files Related to iau.dll

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
utilDebugLog.dll	Trend Micro Anti-Malware Solution Platform	AMSP (6.5)	109224	C:\Program Files\WindowsApps\Microsoft.ZuneVide...
Nitro.dll	Trend Micro Nitro Engine	Platinum (3.12)	2574496	C:\Users\Tester\AppData\Local\Microsoft\OneDrive\
utilNetCtrl.dll	libNetCt DLL	AMSP (6.5)	115280	C:\Program Files\WindowsApps\Microsoft.GetHelp_...
ToolbarIE.dll	Trend Micro TrendSecure	Trend Micro Titanium (16.0)	770336	C:\Program Files\WindowsApps\Microsoft.GetHelp_...
plugCfgProxy.dll	Trend Micro Client Common Plug-in	AMSP (6.5)	1065984	C:\Program Files\WindowsApps\Deleted\Microsoft....

Other Files Related to iau.dll

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
setupact.log	Log	Trend Micro Internet Security 16	62521	C:\Windows\Panther\UnattendGC\
setupact.log	Log	Trend Micro Internet Security 16	14252	C:\Windows\System32\Sysprep\Panther\
setupact.log	Log	Trend Micro Antivirus Plus Security 16	14252	C:\Windows\System32\Sysprep\Panther\
WmiApRpl.h	C/C++/Objective-C Header	Trend Micro Antivirus Plus Security 16	3444	C:\Windows\System32\wbem\Performance\
api-ms-win-core-profil...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.14393.33)	18112	C:\Program Files\Trend Micro\AMSP\

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