Microsoft Windows SYS mf.sys

3 Steps to Download and Fix Mf.sys Errors

Last Updated: 11/25/2023
[Time to Read Article: 5 minutes]

mf.sys is considered a type of Multifunction Enumerator file. It is most-commonly used in Microsoft® Windows® Operating System developed by Microsoft. It uses the SYS file extension and is considered a Win32 EXE (Driver) file.

The release of mf.sys introduced for Windows was on 11/08/2006 in Windows Vista. On 07/29/2015, version 10.0.15063.0 (WinBuild.160101.0800) was released for Windows 10. mf.sys is bundled with the software package in Windows 10, Windows XP, and Windows Vista.

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

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	mf.sys
File Extension:	SYS file extension
Description:	Multifunction Enumerator
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:	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:	0x9000
Code Size:	24064

View Other mf.sys Information

File Info	Description
File Size:	28 kB
File Modification Date/Time:	2017:03:18 18:18:18+00:00
File Inode Change Date/Time:	2017:11:05 07:07:54+00:00
File Type:	Win32 EXE
MIME Type:	application/octet-stream
Warning:	Possibly corrupt Version resource
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	2037:04:13 00:58:12+00:00
PE Type:	PE32
Linker Version:	14.10
Code Size:	24064
Initialized Data Size:	4096
Uninitialized Data Size:	0
Entry Point:	0x9000
OS Version:	10.0
Image Version:	10.0
Subsystem Version:	10.0
Subsystem:	Native
File Version Number:	10.0.15063.0
Product Version Number:	10.0.15063.0
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows NT 32-bit
Object File Type:	Driver
File Subtype:	7
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Microsoft Corporation
File Description:	Multifunction Enumerator
File Version:	10.0.15063.0 (WinBuild.160101.0800)
Internal Name:	mf.sys
Legal Copyright:	© Microsoft Corporation. All rights reserved.
Original Filename:	mf.sys
Product Name:	Microsoft® Windows® Operating System
Product Version:	10.0.15063.0

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

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What are mf.sys Error Messages?

mf.sys Blue Screen of Death (BSOD) Errors

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

mf.sys could not be found.
mf.sys failed to load.
The file mf.sys is missing or corrupt.
Windows failed to start - mf.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: mf.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] (mf.sys).

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

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter mf.sys BSOD errors after you've installed new hardware, software (Windows), or performed a failed Windows Update. In other cases, software corruption caused by a malware infection can lead to mf.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 mf.sys Blue Screen of Death error after recent changes.

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

Step 2: Run SFC (System File Checker) to restore the corrupt or missing mf.sys 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 mf.sys 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 mf.sys 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 mf.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 mf.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 mf.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 mf.sys file version. We maintain a comprehensive database of 100% malware-free mf.sys 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 mf.sys 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\drivers\
Windows Vista: C:\Windows\System32\DriverStore\FileRepository\mf.inf_0e4bc131\
Windows Vista: C:\Windows\System32\DriverStore\FileRepository\mf.inf_a236f8cf\
Windows 7: C:\Windows\System32\DriverStore\FileRepository\mf.inf_amd64_neutral_b263d46928b97a9b\
Windows 8: C:\Windows\System32\DriverStore\FileRepository\mf.inf_x86_401be7ca04dd0db2\
Show 2 more directories +

Windows 8.1: C:\Windows\System32\DriverStore\FileRepository\mf.inf_x86_f9403d732afd2c86\
Windows 10: C:\Windows\System32\DriverStore\FileRepository\mf.inf_x86_88aa785076f23fde\

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 mf.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 mf.sys Files (Malware-Tested 100% Clean)

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

Windows 10

File Name

Software Version

File Version

Architecture

mf.sys

10.0.15063.0

10.0.15063.0 (WinBuild.160101.0800)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Microsoft® Windows® Operating System
Software Version:	10.0.15063.0
File Version:	10.0.15063.0 (WinBuild.160101.0800)
File Size:	29184
File Date:	03/18/2017
MD5 Checksum:	f9d33a2167df2dd81e4a2804de0ebd88
SHA1 Checksum:	72422b16803c1015129a3d6cc45121ff7fc0b1c0
SHA256 Checksum:	1e0d09c93fde37cb0e764474f446d1b29e48b9738cef4b685789e3fdc69e17b9
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	10.0
Initialized Data Size:	4096
Linker Version:	14.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	10.0
File Modification Date/Time:	03/18/2017

Windows XP

File Name

Software Version

File Version

Architecture

mf.sys

5.1.2600.5512

5.1.2600.5512 (xpsp.080413-2111)

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.080413-2111)
File Size:	63744
File Date:	04/14/2008
MD5 Checksum:	a7da20ab18a1bdae28b0f349e57da0d1
SHA1 Checksum:	eb02adf12224a77116655ccfabd4af24f5e530c4
SHA256 Checksum:	c668f419579addf37558241982b0334a93644e9c05919967c494fe9853e62d5b
CRC32:
File Directory Location:	C:\Windows\System32\drivers\

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	5.1
Initialized Data Size:	43392
Linker Version:	7.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	5.1
File Modification Date/Time:	04/14/2008

Windows Vista

File Name

Software Version

File Version

Architecture

mf.sys

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
File Size:	125952
MD5 Checksum:	ee69d127452b1746499b396bfc89eab1
SHA1 Checksum:	6d06f5715c5c6711e6df940f347afe2e953d0b01
SHA256 Checksum:	4a159c7df3633bf23273befda936493d9fa6629f28e9e22e64f9aa8f88bf5707
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

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

mf.sys

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:	138240
File Date:	01/21/2008
MD5 Checksum:	4396d421235daa3abbd51ee8d6af50eb
SHA1 Checksum:	b10e7e3b500230499953a0bf30aa2403b8903e1c
SHA256 Checksum:	b0cbbb56d933dc83184f9e024f7829cbe71497e1fbd5eb442eb69afc4487cbb4
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	6.0
Initialized Data Size:	105984
Linker Version:	8.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	01/21/2008

Windows 8.1

File Name

Software Version

File Version

Architecture

mf.sys

6.3.9600.16521

6.3.9600.16521 (winblue_gdr.140128-1545)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8.1
Software:	Microsoft® Windows® Operating System
Software Version:	6.3.9600.16521
File Version:	6.3.9600.16521 (winblue_gdr.140128-1545)
File Size:	30208
File Date:	11/21/2014
MD5 Checksum:	a57e2827c3a14b52589220099d58d833
SHA1 Checksum:	3458dfc10bbc2b2dde69241d0a54ad2f500f96b3
SHA256 Checksum:	476f71c884ce6deaa0f2dfded43b247e38cba2b4232c8f2b25903fee27116156
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.3
Initialized Data Size:	4096
Linker Version:	11.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.3
File Modification Date/Time:	11/21/2014

Windows 8

File Name

Software Version

File Version

Architecture

mf.sys

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:	127488
File Date:	07/26/2012
MD5 Checksum:	255f18c74cd2ebdffb18e283585e32e9
SHA1 Checksum:	bf40351b4bac5228ed65cf80c8ca93629f21e78d
SHA256 Checksum:	43190d29b9ea318ec1f27a1071d41d37b37b5300bfe6de401e219c5085f3905e
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.2
Initialized Data Size:	99840
Linker Version:	10.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.2
File Modification Date/Time:	07/26/2012

Windows 7

File Name

Software Version

File Version

Architecture

mf.sys

6.1.7600.16385

6.1.7600.16385 (win7_rtm.090713-1255)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
Software:	Microsoft® Windows® Operating System
Software Version:	6.1.7600.16385
File Version:	6.1.7600.16385 (win7_rtm.090713-1255)
File Size:	142848
File Date:	07/13/2009
MD5 Checksum:	8d0e52f36a153d099de7d5a1e233fac7
SHA1 Checksum:	4766f84119f06a526893642a1da33113f4187ee3
SHA256 Checksum:	8e908122262c54e166f2e4d0b5c91eec94e1b231b221b0841cdd932dd8b1b782
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	6.1
Initialized Data Size:	110080
Linker Version:	9.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.1
File Modification Date/Time:	07/13/2009

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Files Related to mf.sys

SYS Files Related to mf.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
udfs.sys	UDF File System Driver	Microsoft® Windows® Operating System (6.3.9600.16384)	261120	C:\Windows\System32\Sysprep\Panther\
lsi_sss.sys	LSI SSS PCIe/Flash Driver (StorPort)	LSI SSS PCIe/Flash Driver (StorPort) (2.10.61.81)	69472	C:\Windows\System32\LogFiles\WMI\RtBackup\
nvstor.sys	NVIDIA® nForce(TM) Sata Performance Driver	NVIDIA nForce(TM) SATA Driver (10.6.0.23)	142232	C:\Windows\Logs\DPX\
sonydcam.sys	1394 Desktop Camera Driver	Microsoft® Windows® Operating System (10.0.15063.0)	28672	C:\Windows\Fonts\
msisadrv.sys	ISA Driver	Microsoft® Windows® Operating System (6.1.7600.16385)	15424	C:\Windows\Fonts\

Other Files Related to mf.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
OneX_v1.xsd	XML Schema Definition	Windows XP	5957	C:\Windows\L2Schemas\
WWAN_profile_v1.xsd	XML Schema Definition	Windows 7	6201	C:\Windows\L2Schemas\
WWAN_profile_v1.xsd	XML Schema Definition	Windows 8.1	6201	C:\Windows\L2Schemas\
WLAN_profile_v1.xsd	XML Schema Definition	Windows 7	15591	C:\Windows\L2Schemas\
WLAN_profile_v1.xsd	XML Schema Definition	Windows 8.1	16142	C:\Windows\L2Schemas\

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