Microsoft Windows DLL QAGENT.DLL

How to Fix QAGENT.DLL DLL Issues and Download Updates

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

QAGENT.DLL, also known as a Quarantine Agent Proxy file, was created by Microsoft for the development of Microsoft® Windows® Operating System. DLL files fall under under the Win32 DLL (Dynamic link library) file type category.

QAGENT.DLL was first released for Windows Vista Operating System on 11/08/2006 with Windows Vista. The most recent version [file version 6.3.9600.17415 (winblue_r4.141028-1500)] was introduced on 10/18/2013 for Windows 8.1. QAGENT.DLL is found in Windows XP, Windows Vista, and Windows 8.1.

Below, you find comprehensive file information, instructions for simple DLL file troubleshooting, and list of free QAGENT.DLL downloads for each available file version.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	QAGENT.DLL
File Extension:	DLL file extension
Description:	Quarantine Agent Proxy
Object File Type:	Dynamic link library
File Operating System:	Windows NT 32-bit
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Microsoft Corporation
Software Program:	Microsoft® Windows® Operating System
Legal Copyright:	© Microsoft Corporation. All rights reserved.

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x1ded0
Code Size:	146944

View Other QAGENT.DLL Information

File Info	Description
File Size:	171 kB
File Modification Date/Time:	2014:11:21 06:53:01+00:00
File Inode Change Date/Time:	2017:11:05 07:04:30+00:00
File Type:	Win32 DLL
MIME Type:	application/octet-stream
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	2014:10:29 01:26:17+00:00
PE Type:	PE32
Linker Version:	11.0
Code Size:	146944
Initialized Data Size:	29696
Uninitialized Data Size:	0
Entry Point:	0x1ded0
OS Version:	6.3
Image Version:	6.3
Subsystem Version:	6.3
Subsystem:	Windows command line
File Version Number:	6.3.9600.17415
Product Version Number:	6.3.9600.17415
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows NT 32-bit
Object File Type:	Dynamic link library
File Subtype:	0
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Microsoft Corporation
File Description:	Quarantine Agent Proxy
File Version:	6.3.9600.17415 (winblue_r4.141028-1500)
Internal Name:	QAgent.DLL
Legal Copyright:	© Microsoft Corporation. All rights reserved.
Original Filename:	QAgent.DLL
Product Name:	Microsoft® Windows® Operating System
Product Version:	6.3.9600.17415

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

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What are QAGENT.DLL Error Messages?

Dynamic Link Library QAGENT.DLL Errors

QAGENT.DLL is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like QAGENT.DLL, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like sapisvr.exe - to follow. These files were created so that multiple programs (eg. Windows) could share the same QAGENT.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 QAGENT.DLL is attempted to be loaded either when Windows is starting up, or in some cases already running. Some of the most common QAGENT.DLL errors include:

Access Violation at address - QAGENT.DLL.
QAGENT.DLL could not be found.
Cannot find C:\Windows\System32\QAGENT.DLL.
Cannot register QAGENT.DLL.
Cannot start Windows. A required component is missing: QAGENT.DLL. Please install Windows again.
Failed to load QAGENT.DLL.
The application has failed to start because QAGENT.DLL was not found.
The file QAGENT.DLL is missing or corrupt.
This application failed to start because QAGENT.DLL was not found. Re-installing the application may fix this problem.

Your QAGENT.DLL file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Windows), or deleted by a malware infection. Furthermore, QAGENT.DLL file corruption could be caused from a power outage when loading Windows, system crash while loading QAGENT.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 QAGENT.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 QAGENT.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 QAGENT.DLL error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing QAGENT.DLL file.

System File Checker is a utility included with every Windows version that allows you scan and restore corrupted system files. Use the SFC tool to fix missing or corrupt QAGENT.DLL files (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
In the search box, type "cmd" but DO NOT PRESS "ENTER".
Press and hold "CTRL-Shift" on your keyboard while pressing "ENTER".
You'll be prompted with a permission dialog box.
In the box, click "YES".
You should have a black screen with a blinking cursor.
In that black screen, type "sfc /scannow" and hit "ENTER".
SFC will begin scanning for QAGENT.DLL issues and any other system file problems.
Follow any on-screen commands to complete the process.

Please be aware that this scan might take a while, so please be patient while it is working.

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

sfc /scannow

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 QAGENT.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 QAGENT.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 QAGENT.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 QAGENT.DLL file version. We maintain a comprehensive database of 100% malware-free QAGENT.DLL files for every applicable version of Windows. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download QAGENT.DLL Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy the file into the appropriate directory for your Windows version:

Windows XP: C:\WINDOWS\system32\dllcache\
Windows XP: C:\Windows\System32\
Windows Vista: C:\Windows\SysWOW64\
Windows Vista: C:\Windows\System32\
Windows 7: C:\Windows\System32\
Show 3 more directories +

Windows 7: C:\Windows\SysWOW64\
Windows 8: C:\Windows\System32\
Windows 8.1: C:\Windows\System32\

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 8.1.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve QAGENT.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 QAGENT.DLL Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying QAGENT.DLL to your appropriate Windows system directory. Microsoft typically does not release Windows 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 QAGENT.DLL and all other DLL files for Windows. An incorrectly installed DLL file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows XP

File Name

Software Version

File Version

Architecture

QAGENT.DLL

5.1.2600.5512

5.1.2600.5512 (xpsp.080413-0852)

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows XP
Software:	Microsoft® Windows® Operating System
Software Version:	5.1.2600.5512
File Version:	5.1.2600.5512 (xpsp.080413-0852)
File Size:	150528
File Date:	04/14/2008
MD5 Checksum:	fb8e05cedb3ef65c80febd2698c80998
SHA1 Checksum:	93b85a254e7d1746d6a1c1d054efd9c606e78eb4
SHA256 Checksum:	9519b19edf535f9dad4ecbfd7fb3733c8a70de04ab549f0d35c96cc06c02c17a
CRC32:
File Directory Location:	C:\WINDOWS\system32\dllcache\ C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	5.1
Initialized Data Size:	33792
Linker Version:	7.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows command line
Subsystem Version:	4.10
File Modification Date/Time:	04/14/2008

Windows Vista

File Name

Software Version

File Version

Architecture

QAGENT.DLL

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
File Size:	172544
MD5 Checksum:	bde89ab6f15f0093a2a7861d1fc413ed
SHA1 Checksum:	1dc8c88662859505028f047570866e8e356f8e7d
SHA256 Checksum:	cdd703b147dd2b49fb4dd3ef8e8e97a9496782462af8d65ac70d3075e4e0514a
CRC32:
File Directory Location:	C:\Windows\SysWOW64\

File Version, System, and Machine Information
There is no information available.

QAGENT.DLL

6.0.6001.18000

6.0.6001.18000 (longhorn_rtm.080118-1840)

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
Software:	Microsoft® Windows® Operating System
Software Version:	6.0.6001.18000
File Version:	6.0.6001.18000 (longhorn_rtm.080118-1840)
File Size:	250880
File Date:	01/21/2008
MD5 Checksum:	a77267cdde66443fb779cee39cee2141
SHA1 Checksum:	8d44728330e784b8b88fbe7dc56e022f30fc6be7
SHA256 Checksum:	8af7cb2343156a185f07af1d08c3407b4366e62cea1352ea29ff35f46ef2f10d
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	6.0
Initialized Data Size:	38400
Linker Version:	8.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows command line
Subsystem Version:	6.0
File Modification Date/Time:	01/21/2008

Windows 8.1

File Name

Software Version

File Version

Architecture

QAGENT.DLL

6.3.9600.17415

6.3.9600.17415 (winblue_r4.141028-1500)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8.1
Software:	Microsoft® Windows® Operating System
Software Version:	6.3.9600.17415
File Version:	6.3.9600.17415 (winblue_r4.141028-1500)
File Size:	175104
File Date:	11/21/2014
MD5 Checksum:	74e2b39d628c5c28af5925c5f83c06a1
SHA1 Checksum:	debfcbf169eb7e126a259f75497462d760339471
SHA256 Checksum:	91a512f646811f5bac2a2fe13b6ce6f8b53fc4f80a3602825c96faf36304228e
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.3
Initialized Data Size:	29696
Linker Version:	11.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows command line
Subsystem Version:	6.3
File Modification Date/Time:	11/21/2014

Windows 8

File Name

Software Version

File Version

Architecture

QAGENT.DLL

6.2.9200.16384

6.2.9200.16384 (win8_rtm.120725-1247)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8
Software:	Microsoft® Windows® Operating System
Software Version:	6.2.9200.16384
File Version:	6.2.9200.16384 (win8_rtm.120725-1247)
File Size:	166912
File Date:	07/26/2012
MD5 Checksum:	05c354fdf9e85e99ff01be4afc7ca676
SHA1 Checksum:	387963ffb0ec639d671d9065d58b2f91924527cb
SHA256 Checksum:	f466661a801b35d3205704b3343ae50c182f7216f9d8effec7eddd02af4281e1
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.2
Initialized Data Size:	32768
Linker Version:	10.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows command line
Subsystem Version:	6.2
File Modification Date/Time:	07/26/2012

Windows 7

File Name

Software Version

File Version

Architecture

QAGENT.DLL

6.1.7601.17514

6.1.7601.17514 (win7sp1_rtm.101119-1850)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
Software:	Microsoft® Windows® Operating System
Software Version:	6.1.7601.17514
File Version:	6.1.7601.17514 (win7sp1_rtm.101119-1850)
File Size:	266240
File Date:	11/21/2010
MD5 Checksum:	6b851e682a36453e1b1ee297ffb6e2ab
SHA1 Checksum:	3dc85ba13d1f720e8039865817bcc65dc0f1d35b
SHA256 Checksum:	a641d3fd9463c4788b45b8b5584ea4489c1f63a71b4b595ae85ff3482cd5eda6
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	6.1
Initialized Data Size:	145408
Linker Version:	9.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows command line
Subsystem Version:	6.1
File Modification Date/Time:	11/21/2010

QAGENT.DLL

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
File Size:	171520
MD5 Checksum:	02530b0b7e048dd5ac8d52daeacaeb2b
SHA1 Checksum:	f9e7ba0d9cd81067d58407d054264e7ff56c0999
SHA256 Checksum:	2deb454f8b71ec54c59185e2f1d679f7ec1c7aefcd1d59761fdd3d70cabe0254
CRC32:
File Directory Location:	C:\Windows\SysWOW64\

File Version, System, and Machine Information
There is no information available.

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Files Related to QAGENT.DLL

DLL Files Related to QAGENT.DLL

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
ialmdnt5.dll	Controller Hub for Intel Graphics Driver	Intel Graphics Accelerator Drivers for Windows NT(R) (6.14.10.4656)	163840	C:\Windows\WinSxS\amd64_microsoft-windows-wmi-c...
clb.dll	Column List Box	Microsoft® Windows® Operating System (6.2.9200.16384)	14336	C:\Windows\Panther\UnattendGC\
scrptadm.dll	Script Adm Extension	Microsoft® Windows® Operating System (6.0.6002.18005)	523776	C:\Windows\Logs\DPX\
MTFUtils.DLL	Microsoft IME	Microsoft® Windows® Operating System (6.3.9600.17415)	38400	C:\Windows\SysWOW64\en-US\
sbs_diasymreader.dll	Dynamic Link Library	Windows 8.1	7680	C:\Windows\inf\WmiApRpl\0009\

Other Files Related to QAGENT.DLL

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
WWAN_profile_v1.xsd	XML Schema Definition	Microsoft Office Access 2010 14	6201	C:\Windows\Temp\527D94AF-D053-4381-B105-0D815D5...
WLANAP_profile_v1.xsd	XML Schema Definition	Windows 10	7548	C:\Windows\L2Schemas\
WLAN_profile_v1.xsd	XML Schema Definition	Windows XP	15263	C:\Windows\L2Schemas\
WLAN_policy_v1.xsd	XML Schema Definition	Windows 7	7405	C:\Windows\L2Schemas\
WLAN_policy_v1.xsd	XML Schema Definition	Windows Vista	6446	C:\Windows\L2Schemas\

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