Realtek Semiconductor Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter SYS RTL8187B.sys

Repair and Download RTL8187B.sys (Fix BSOD Errors)

Last Updated: 12/06/2025
[Time Required for Reading: 3.5 minutes]

RTL8187B.sys uses the SYS file extension, which is more specifically known as a Realtek RTL8187B NDIS Driver file. It is classified as a Win64 EXE (Driver) file, created for Realtek RTL8187B Wireless USB 2.0 Adapter by Realtek Semiconductor.

RTL8187B.sys was first released for Windows 7 Operating System on 07/22/2009 with Windows 7. The latest version update [v6.1135.0625.2008 built by: WinDDK] for Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter was 2015-10-28 released on 05/31/2019. RTL8187B.sys is included in Windows 10, Windows 8.1, and Windows 8 versions.

Continue reading below to discover detailed file information, SYS file troubleshooting, and free downloads of several versions of RTL8187B.sys.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	RTL8187B.sys
File Extension:	SYS file extension
Description:	Realtek RTL8187B NDIS Driver
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:	Realtek Semiconductor Corporation
Software Program:	Realtek RTL8187B Wireless USB 2.0 Adapter
Legal Copyright:	Copyright (C) 2008 Realtek Semiconductor Corporation

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	Private build
File Flags Mask:	0x003f
Entry Point:	0x5441c
Code Size:	345600

View Other RTL8187B.sys Information

File Info	Description
File Size:	394 kB
File Modification Date/Time:	2019:11:25 15:59:43+00:00
File Type:	Win64 EXE
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2008:06:26 13:26:18+00:00
PE Type:	PE32+
Linker Version:	8.0
Code Size:	345600
Initialized Data Size:	79872
Uninitialized Data Size:	0
Entry Point:	0x5441c
OS Version:	6.0
Image Version:	6.0
Subsystem Version:	6.0
Subsystem:	Native
File Version Number:	6.1135.625.2008
Product Version Number:	6.1135.625.2008
File Flags Mask:	0x003f
File Flags:	Private build
File OS:	Windows NT 32-bit
Object File Type:	Driver
File Subtype:	6
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Realtek Semiconductor Corporation
File Description:	Realtek RTL8187B NDIS Driver
File Version:	6.1135.0625.2008 built by: WinDDK
Internal Name:	Rtl8187b.sys
Legal Copyright:	Copyright (C) 2008 Realtek Semiconductor Corporation
Product Name:	Realtek RTL8187B Wireless USB 2.0 Adapter
Product Version:	6.1135.0625.2008

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

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What are RTL8187B.sys Error Messages?

RTL8187B.sys Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with RTL8187B.sys. Most of the issues concerning sys files involve Blue Screen of Death (BSOD) errors. These types of RTL8187B.sys errors can be cause by hardware problems, outdated firmware, corrupt drivers, or other software-related (eg. Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter update) issues. Some of these errors include:

RTL8187B.sys could not be found.
RTL8187B.sys failed to load.
The file RTL8187B.sys is missing or corrupt.
Windows failed to start - RTL8187B.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: RTL8187B.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] (RTL8187B.sys).

STOP 0x00000050: PAGE FAULT IN A NONPAGED AREA (RTL8187B.sys) STOP 0x0000000A: IRQL NOT LESS EQUAL (RTL8187B.sys) STOP 0x0000007E: SYSTEM THREAD EXCEPTION NOT HANDLED (RTL8187B.sys) STOP 0x0000003B: SYSTEM SERVICE EXCEPTION (RTL8187B.sys) STOP 0×0000007A: KERNEL DATA INPAGE (RTL8187B.sys) STOP 0x0000001E: KMODE EXCEPTION NOT HANDLED (RTL8187B.sys)

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter RTL8187B.sys BSOD errors after you've installed new hardware, software (Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter), or performed a failed Windows Update. In other cases, software corruption caused by a malware infection can lead to RTL8187B.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 RTL8187B.sys Blue Screen of Death error after recent changes.

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How to Fix RTL8187B.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 RTL8187B.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 RTL8187B.sys error, please proceed to the Step 2 below.

Step 2: If recently installed Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter (or related software), uninstall then try reinstalling Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter software.

You can uninstall Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter 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 Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter 2015-10-28 and click "Uninstall"
Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter software.

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

Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter 2015-10-28

Realtek Semiconductor

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 RTL8187B.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 RTL8187B.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 RTL8187B.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 RTL8187B.sys file version. We maintain a comprehensive database of 100% malware-free RTL8187B.sys files for every applicable version of Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download RTL8187B.sys Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy this file to the appropriate Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter folder location:

Windows 7: C:\Windows\System32\DriverStore\FileRepository\net8187bv64.inf_amd64_neutral_d9eee378245b3b8b\
Windows 8: C:\Windows\System32\DriverStore\FileRepository\net8187bv32.inf_x86_4133912759f4531a\
Windows 8.1: C:\Windows\System32\DriverStore\FileRepository\net8187bv32.inf_x86_2366a1ce78c15573\
Windows 10: C:\WINDOWS\system\
Windows 10: C:\Windows\System32\drivers\
Show 5 more directories +
Windows 10: C:\Program Files (x86)\REALTEK RTL8187B Wireless LAN Driver\Driver\
Windows 10: C:\Windows\OPTIONS\CABS\
Windows 10: C:\3DP\Net\Realtek\8187B\764\
Windows 10: C:\3DP\Net\Realtek\8187B\732\
Windows 10: C:\Windows\System32\DriverStore\FileRepository\net8187bv32.inf_x86_6e8b9c762f10d047\
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 RTL8187B.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 RTL8187B.sys Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying RTL8187B.sys to your appropriate Windows system directory. Realtek Semiconductor typically does not release Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter 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 RTL8187B.sys and all other SYS files for Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter. An incorrectly installed SYS file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter 2015-10-28

File Name

Software Version

File Version

Architecture

RTL8187B.sys

6.1135.625.2008

6.1135.0625.2008 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Realtek RTL8187B Wireless USB 2.0 Adapter
Software Version:	6.1135.625.2008
File Version:	6.1135.0625.2008 built by: WinDDK
File Size:	402944
File Date:	11/25/2019
MD5 Checksum:	dc61c582c1f4966cb831a2ce6c115a6b
SHA1 Checksum:	3c66c604020fd0ec5ab22ad182a2f224df8c7317
SHA256 Checksum:	3c2aa946bb3bed0c443d9df80859f14524d484e71eef06297f39c1db0062bd0e
CRC32:
File Directory Location:	C:\WINDOWS\system\ C:\Windows\System32\drivers\ C:\Program Files (x86)\REALTEK RTL8187B Wirele ... C:\Windows\OPTIONS\CABS\

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	6.0
Initialized Data Size:	79872
Linker Version:	8.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	11/25/2019

3DP Net 18.12

File Name

Software Version

File Version

Architecture

RTL8187B.sys

62.1182.331.2010

62.1182.0331.2010 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Realtek RTL8187B Wireless USB 2.0 Adapter
Software Version:	62.1182.331.2010
File Version:	62.1182.0331.2010 built by: WinDDK
File Size:	450048
File Date:	11/11/2019
MD5 Checksum:	945ab249d12cbe044782430c6013aa1a
SHA1 Checksum:	340d10d843b4549618c1620b1be6d2827fcfbfa9
SHA256 Checksum:	912514c99a8aeebecbfcb3632520c12f9cb8a8286be1c70567c8e9d5416320df
CRC32:
File Directory Location:	C:\3DP\Net\Realtek\8187B\764\

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	6.1
Initialized Data Size:	84992
Linker Version:	9.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.1
File Modification Date/Time:	11/11/2019

RTL8187B.sys

62.1182.331.2010

62.1182.0331.2010 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Realtek RTL8187B Wireless USB 2.0 Adapter
Software Version:	62.1182.331.2010
File Version:	62.1182.0331.2010 built by: WinDDK
File Size:	379904
File Date:	11/11/2019
MD5 Checksum:	949f74cb383a1d5da67aea9ccd4a8b87
SHA1 Checksum:	aa28cb13de3ec0ced21f49bc624d2c282005b497
SHA256 Checksum:	f3fe508a5ee5ae86351ecb8971651ef1b75cac4b7cf68eebe2846285dcaa2099
CRC32:
File Directory Location:	C:\3DP\Net\Realtek\8187B\732\

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.1
Initialized Data Size:	68608
Linker Version:	9.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.1
File Modification Date/Time:	11/11/2019

Windows 10

File Name

Software Version

File Version

Architecture

RTL8187B.sys

62.1187.318.2013

62.1187.0318.2013 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Realtek RTL8187B Wireless USB 2.0 Adapter
Software Version:	62.1187.318.2013
File Version:	62.1187.0318.2013 built by: WinDDK
File Size:	381440
File Date:	03/18/2017
MD5 Checksum:	c00e0111e1c79732b29b411043bc28f0
SHA1 Checksum:	fdb1821a4b381c0506d9737fa29f9138e1dcfcdf
SHA256 Checksum:	90cd2c1f573aef701d67bed12fb4984cf7a556f42a51da42fc49a7fa9b868630
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.1
Initialized Data Size:	68608
Linker Version:	9.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.1
File Modification Date/Time:	03/18/2017

Windows 8.1

File Name

Software Version

File Version

Architecture

RTL8187B.sys

62.1187.318.2013

62.1187.0318.2013 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8.1
Software:	Realtek RTL8187B Wireless USB 2.0 Adapter
Software Version:	62.1187.318.2013
File Version:	62.1187.0318.2013 built by: WinDDK
File Size:	388680
File Date:	06/18/2013
MD5 Checksum:	b98995ce86b94bcf876713241ffc3ba0
SHA1 Checksum:	ffaed93243d624dd9e2d74563c9ce00194521016
SHA256 Checksum:	ca7218fe80747aab1efcb9763b0a4c31eb559ea777b2ccf7139900a28cdb5428
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.1
Initialized Data Size:	68608
Linker Version:	9.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.1
File Modification Date/Time:	06/18/2013

Windows 8

File Name

Software Version

File Version

Architecture

RTL8187B.sys

6.1159.323.2009

6.1159.0323.2009 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8
Software:	Realtek RTL8187B Wireless USB 2.0 Adapter
Software Version:	6.1159.323.2009
File Version:	6.1159.0323.2009 built by: WinDDK
File Size:	347136
File Date:	06/02/2012
MD5 Checksum:	ca5a4fbfe341f13733955b8aac98f0b5
SHA1 Checksum:	8c362bf662391fe37b605a3eaeccb3d16edf9d4d
SHA256 Checksum:	4675bab8bbb1069fadf880e7e570a255dbcab063df4f754d5cbef1d2793ed993
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.0
Initialized Data Size:	66560
Linker Version:	8.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	06/02/2012

Windows 7

File Name

Software Version

File Version

Architecture

RTL8187B.sys

6.1159.323.2009

6.1159.0323.2009 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
Software:	Realtek RTL8187B Wireless USB 2.0 Adapter
Software Version:	6.1159.323.2009
File Version:	6.1159.0323.2009 built by: WinDDK
File Size:	416768
File Date:	06/10/2009
MD5 Checksum:	f70a9384917659a4c5ef30f0f4ec484d
SHA1 Checksum:	d752c6c74169f92e2168eb4415cfe8f81201fbe0
SHA256 Checksum:	c42e591ba10c3bff60c93057f205ea7673292a4fb669af654806a8e13b51cb2b
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:	80896
Linker Version:	8.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	06/10/2009

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Files Related to RTL8187B.sys

SYS Files Related to RTL8187B.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
RTL8187B.sys	Realtek RTL8187B NDIS Driver	Realtek RTL8187B Wireless USB 2.0 Adapter (6.1135.0625.2008)	402944	C:\Windows\Fonts\

Other Files Related to RTL8187B.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
setupact.log	Log	Realtek High Definition Audio Codec (Windows 7 / 8/ 8.1/ 10 64-bit) R2.82	62830	C:\Windows\Panther\UnattendGC\
setupact.log	Log	Realtek RTL8187B Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter 2015-10-28	14252	C:\Windows\System32\Sysprep\Panther\
WmiApRpl.h	C/C++/Objective-C Header	Realtek High Definition Audio Codec (Windows 7 / 8/ 8.1/ 10 64-bit) R2.82	3444	C:\Windows\System32\wbem\Performance\
api-ms-win-core-sysinf...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.17134.12)	12136	C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
diagwrn.xml	Extensible Markup Language	Realtek High Definition Audio Codec (Windows 7 / 8/ 8.1/ 10 64-bit) R2.82	5718	C:\Windows\System32\Sysprep\Panther\

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