Avast Software Avast Internet Security SYS aswMonFlt.sys

Download and Repair AswMonFlt.sys Issues

Last Updated: 11/25/2024
[Time Required for Reading: 3.5 minutes]

Avast File System Minifilter for Windows 2003/Vista files, such as aswMonFlt.sys, are considered a type of Win64 EXE (Driver) file. They are associated with the SYS file extension, developed by Avast Software for Avast Antivirus.

The first version of aswMonFlt.sys for Avast Antivirus 19.8.2393 was seen on 09/30/2019 in Windows 10. The latest file update released for Avast Internet Security 19.6.2383 was on 06/28/2019 [file version 19.8.4256.0].

In this short article, you will discover detailed file information, steps for troubleshooting SYS file problems with aswMonFlt.sys, and list of free downloads for every version that exists in our comprehensive file directory.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	aswMonFlt.sys
File Extension:	SYS file extension
Description:	Avast File System Minifilter for Windows 2003/Vista
Object File Type:	Driver
File Operating System:	Windows NT 32-bit
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	AVAST Software
Software Program:	Avast Antivirus
Legal Copyright:	Copyright (c) 2019 AVAST Software

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	Private build
File Flags Mask:	0x003f
Entry Point:	0x2d000
Code Size:	118784

View Other aswMonFlt.sys Information

File Info	Description
File Size:	168 kB
File Modification Date/Time:	2019:10:30 20:16:45+00:00
File Type:	Win64 EXE
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2019:09:06 10:05:43+00:00
PE Type:	PE32+
Linker Version:	14.16
Code Size:	118784
Initialized Data Size:	65536
Uninitialized Data Size:	0
Entry Point:	0x2d000
OS Version:	10.0
Image Version:	10.0
Subsystem Version:	6.1
Subsystem:	Windows GUI
File Version Number:	19.8.4256.0
Product Version Number:	19.8.4256.0
File Flags Mask:	0x003f
File Flags:	Private build
File OS:	Windows NT 32-bit
Object File Type:	Driver
File Subtype:	7
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	AVAST Software
File Description:	Avast File System Minifilter for Windows 2003/Vista
File Version:	19.8.4256.0
Internal Name:	aswMonFlt.sys
Legal Copyright:	Copyright (c) 2019 AVAST Software
Product Name:	Avast Antivirus
Product Version:	19.8.4256.0

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

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What are aswMonFlt.sys Error Messages?

aswMonFlt.sys Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with aswMonFlt.sys. Most of the issues concerning sys files involve Blue Screen of Death (BSOD) errors. These types of aswMonFlt.sys errors can be cause by hardware problems, outdated firmware, corrupt drivers, or other software-related (eg. Avast Internet Security update) issues. Some of these errors include:

aswMonFlt.sys could not be found.
aswMonFlt.sys failed to load.
The file aswMonFlt.sys is missing or corrupt.
Windows failed to start - aswMonFlt.sys.

A problem has been detected and Windows has been shut down to prevent damage to your computer. The problem seems to be caused by the following file: aswMonFlt.sys.

:( Your PC ran into a problem that it couldn't handle, and now needs to restart. You can search for the error online: [BSOD] (aswMonFlt.sys).

STOP 0x0000003B: SYSTEM SERVICE EXCEPTION (aswMonFlt.sys) STOP 0x00000050: PAGE FAULT IN A NONPAGED AREA (aswMonFlt.sys) STOP 0×0000007A: KERNEL DATA INPAGE (aswMonFlt.sys) STOP 0x0000001E: KMODE EXCEPTION NOT HANDLED (aswMonFlt.sys) STOP 0x0000000A: IRQL NOT LESS EQUAL (aswMonFlt.sys) STOP 0x0000007E: SYSTEM THREAD EXCEPTION NOT HANDLED (aswMonFlt.sys)

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter aswMonFlt.sys BSOD errors after you've installed new hardware, software (Avast Internet Security), or performed a failed Windows Update. In other cases, software corruption caused by a malware infection can lead to aswMonFlt.sys Blue Screen of Death errors. Therefore, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

GEEK TIP : As a rule of thumb, it's always a good idea to create a Windows "Snapshot" backup / System Restore Point before making any hardware or software changes to your computer. That way, it's very easy to restore your system in the unfortunate event you encounter a aswMonFlt.sys Blue Screen of Death error after recent changes.

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How to Fix aswMonFlt.sys 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 aswMonFlt.sys 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 aswMonFlt.sys error, please proceed to the Step 2 below.

Step 2: If recently installed Avast Internet Security (or related software), uninstall then try reinstalling Avast Internet Security software.

You can uninstall Avast Internet 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 Avast Internet Security 19.6.2383 and click "Uninstall"
Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Avast Internet Security software.

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

Avast Internet Security 19.6.2383

Avast Software

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 aswMonFlt.sys 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 aswMonFlt.sys 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 aswMonFlt.sys 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 aswMonFlt.sys file version. We maintain a comprehensive database of 100% malware-free aswMonFlt.sys files for every applicable version of Avast Internet 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 aswMonFlt.sys Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy this file to the appropriate Avast Internet Security folder location:

Windows 10: C:\Windows\System32\drivers\
Windows 10: C:\Program Files\AVAST Software\Avast\setup\Inf\x64\
Windows 10: C:\Windows\System32\drivers\
Windows 10: C:\Program Files\AVAST Software\Avast\setup\Inf\x64\
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 aswMonFlt.sys 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 aswMonFlt.sys Files (Malware-Tested 100% Clean)

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

Avast Internet Security 19.6.2383

File Name

Software Version

File Version

Architecture

aswMonFlt.sys

19.8.4256.0

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Avast Antivirus
Software Version:	19.8.4256.0
File Version:	19.8.4256.0
File Size:	171520
File Date:	10/30/2019
MD5 Checksum:	ae656590bc3138b8ecf9001bd351380c
SHA1 Checksum:	eb74be86d60d4b90cf5a0d63df4e20778268a39c
SHA256 Checksum:	76a0389a92b49e60dca221c415c9122fd244cfa340e33bae58311af91470b299
CRC32:
File Directory Location:	C:\Windows\System32\drivers\ C:\Program Files\AVAST Software\Avast\setup\In ...

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	10.0
Initialized Data Size:	65536
Linker Version:	14.16
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	6.1
File Modification Date/Time:	10/30/2019

Avast Antivirus 19.8.2393

File Name

Software Version

File Version

Architecture

aswMonFlt.sys

19.8.4256.0

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Avast Antivirus
Software Version:	19.8.4256.0
File Version:	19.8.4256.0
File Size:	171520
File Date:	10/30/2019
MD5 Checksum:	ae656590bc3138b8ecf9001bd351380c
SHA1 Checksum:	eb74be86d60d4b90cf5a0d63df4e20778268a39c
SHA256 Checksum:	76a0389a92b49e60dca221c415c9122fd244cfa340e33bae58311af91470b299
CRC32:
File Directory Location:	C:\Windows\System32\drivers\ C:\Program Files\AVAST Software\Avast\setup\In ...

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	10.0
Initialized Data Size:	65536
Linker Version:	14.16
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	6.1
File Modification Date/Time:	10/30/2019

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Files Related to aswMonFlt.sys

SYS Files Related to aswMonFlt.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
aswbidsdriver.sys	IDS Application Activity Monitor Driver.	Avast (19.8.4256.0)	274456	C:\Windows\Temp\69226001-A1CC-2D41-3BF8-D818E70...
aswNetSec.sys	Avast Antivirus Firewall Driver	Avast Antivirus (19.8.4256.0)	552848	C:\Program Files\WindowsApps\Microsoft.XboxApp_...
NXQuery.sys	NX Support Check	Microsoft® Windows® Operating System (10.0.18362.1)	16024	C:\Users\Tester\AppData\Local\Packages\Microsof...
aswArPot.sys	Avast anti rootkit	Avast Antivirus (19.8.4256.0)	204824	C:\Windows\Temp\54E0702D-A2DE-4D90-BD64-23960F5...
winsetupboot.sys	SetupPlatform NEO Mini-Filter	Microsoft® Windows® Operating System (10.0.18362.418)	66568	C:\Program Files\Common Files\Microsoft Shared\...

Other Files Related to aswMonFlt.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
setupact.log	Log	Avast Internet Security 19.6.2383	1304398	C:\Windows\Panther\NewOs\Panther\
WmiApRpl.ini	Windows Initialization	Avast Internet Security 19.6.2383	29736	C:\Windows\inf\WmiApRpl\0009\
api-ms-win-core-profil...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.18362.1)	10696	C:\Program Files\AVAST Software\Avast\setup\red...
api-ms-win-core-heap-l...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.18362.1)	11720	C:\Program Files\AVAST Software\Avast\setup\red...
api-ms-win-core-sysinf...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.17134.12)	19064	C:\Users\Tester\AppData\Local\Microsoft\OneDriv...

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