Microsoft Windows SYS stcusb.sys

3 Steps to Download and Fix Stcusb.sys Errors

Last Updated: 12/02/2024
[Time Required for Reading: 3.5 minutes]

The development of Microsoft® Windows® Operating System by Microsoft prompted the latest creation of stcusb.sys. It is also known as a SCM USB Smart Card Reader file (file extension SYS), which is classified as a type of Win64 EXE (Driver) file.

stcusb.sys was first released for Windows Vista Operating System on 11/08/2006 with Windows Vista. The most recent version [file version 6.1.6941.0 (winmain.081101-1740)] was introduced on 07/22/2009 for Windows 7.

In this article, you will find detailed stcusb.sys information, a SYS file troubleshooting guide, and a list of versions that are available for free download.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	stcusb.sys
File Extension:	SYS file extension
Description:	SCM USB Smart Card Reader
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:	SCM Microsystems, Inc.
Software Program:	Microsoft® Windows® Operating System
Legal Copyright:	Copyright (C) SCM Microsystems, Inc. 1998

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x9084
Code Size:	19968

View Other stcusb.sys Information

File Info	Description
File Size:	26 kB
File Modification Date/Time:	2009:06:10 20:37:57+00:00
File Inode Change Date/Time:	2017:11:05 07:07:16+00:00
File Type:	Win64 EXE
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2008:11:02 05:21:09+00:00
PE Type:	PE32+
Linker Version:	9.0
Code Size:	19968
Initialized Data Size:	5120
Uninitialized Data Size:	0
Entry Point:	0x9084
OS Version:	6.1
Image Version:	6.1
Subsystem Version:	6.1
Subsystem:	Native
File Version Number:	6.1.6941.0
Product Version Number:	6.1.6941.0
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:	SCM Microsystems, Inc.
File Description:	SCM USB Smart Card Reader
File Version:	6.1.6941.0 (winmain.081101-1740)
Internal Name:	stcusb.sys
Legal Copyright:	Copyright (C) SCM Microsystems, Inc. 1998
Original Filename:	stcusb.sys
Product Name:	Microsoft® Windows® Operating System
Product Version:	6.1.6941.0

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

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What are stcusb.sys Error Messages?

stcusb.sys Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with stcusb.sys. Most of the issues concerning sys files involve Blue Screen of Death (BSOD) errors. These types of stcusb.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:

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

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

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter stcusb.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 stcusb.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 stcusb.sys Blue Screen of Death error after recent changes.

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

Step 2: Run SFC (System File Checker) to restore the corrupt or missing stcusb.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 stcusb.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 stcusb.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 stcusb.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 stcusb.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 stcusb.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 stcusb.sys file version. We maintain a comprehensive database of 100% malware-free stcusb.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 stcusb.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 Vista: C:\Windows\System32\DriverStore\FileRepository\smartcrd.inf_d456a6e4\
Windows Vista: C:\Windows\System32\DriverStore\FileRepository\smartcrd.inf_2023d8b5\
Windows 7: C:\Windows\System32\DriverStore\FileRepository\smartcrd.inf_amd64_neutral_6fb75ea318f84fe5\

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 7.

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

CAUTION : We strongly advise against downloading and copying stcusb.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 stcusb.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 Vista

File Name

Software Version

File Version

Architecture

stcusb.sys

6.0.6000.16386

6.0.6000.16386 (vista_rtm.061101-2205)

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
Software:	Microsoft® Windows® Operating System
Software Version:	6.0.6000.16386
File Version:	6.0.6000.16386 (vista_rtm.061101-2205)
File Size:	26624
File Date:	11/02/2006
MD5 Checksum:	ee52dbee71020e195454cc3a5fd97eb8
SHA1 Checksum:	dbef1c67163532e700918b64beef98b9ff34cdba
SHA256 Checksum:	4fce14f10ba63e5a8f78635e0e836e48285c268b5a9a6abd2b44e762cfa5de89
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:	5632
Linker Version:	8.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	11/02/2006

stcusb.sys

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
File Size:	26624
MD5 Checksum:	ab946e5d929d6ba5bf33eb7de30f9991
SHA1 Checksum:	a4c3ddca7339b9b98242125f215b4bfa13131291
SHA256 Checksum:	c011e3bd428fba2e698d55361d6b0551bdf1cb29f4881d0084c3cc272758d2e2
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

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

Windows 7

File Name

Software Version

File Version

Architecture

stcusb.sys

6.1.6941.0

6.1.6941.0 (winmain.081101-1740)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
Software:	Microsoft® Windows® Operating System
Software Version:	6.1.6941.0
File Version:	6.1.6941.0 (winmain.081101-1740)
File Size:	26112
File Date:	06/10/2009
MD5 Checksum:	9e3e9e219a9cd617cdb541841997c3d8
SHA1 Checksum:	c70f52f09272e5b2d1cb67fda38c38d75c5dd5b1
SHA256 Checksum:	ae023423647918bfb2f8b0762016a36250188b04669103292f65b27a9831129c
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:	5120
Linker Version:	9.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.1
File Modification Date/Time:	06/10/2009

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Files Related to stcusb.sys

SYS Files Related to stcusb.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
fastfat.sys	Fast FAT File System Driver	Microsoft® Windows® Operating System (6.3.9600.16384)	179552	C:\Windows\System32\Sysprep\Panther\
atlmc.sys	ATL 452 and 7100 Series Libraries	Microsoft® Windows® Operating System (6.2.9200.16384)	9728	C:\Windows\Boot\PCAT\de-DE\
AGRSM.sys	SoftModem Device Driver	LSI SoftModem Driver (2.2.89.2)	1035776	C:\Windows\System32\LogFiles\WMI\RtBackup\
mouclass.sys	Mouse Class Driver	Microsoft® Windows® Operating System (6.2.9200.16384)	39152	C:\Windows\Temp\
breecemc.sys	Breece Hill Q7, Q47 and Q2.15! Libraries	Microsoft® Windows® Operating System (6.1.7601.17514)	12288	C:\Windows\Boot\PCAT\qps-ploc\

Other Files Related to stcusb.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
WWAN_profile_v1.xsd	XML Schema Definition	Windows 8.1	6201	C:\Windows\L2Schemas\
WWAN_profile_v1.xsd	XML Schema Definition	Windows 10	6201	C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd	XML Schema Definition	Windows 7	7504	C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd	XML Schema Definition	Windows 8.1	7548	C:\Windows\L2Schemas\
WLAN_profile_v1.xsd	XML Schema Definition	Windows 7	15591	C:\Windows\L2Schemas\

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