Mstlsapi.dll: How to Fix DLL Errors, Download, and Update

Last Updated: 11/26/2023
[Time to Read Article: 5 minutes]

DLL files such as mstlsapi.dll are categorized as Win64 DLL (Executable application) files. As a Microsoft® Terminal Server Licensing file, it was created for use in Microsoft® Windows® Operating System by Microsoft.

mstlsapi.dll was first developed on 10/25/2001 in the Windows XP Operating System for Windows XP. The newest file release date for Windows Vista was 11/08/2006 [version 6.0.6002.18005 (lh_sp2rtm.090410-1830)].

This article discusses complete file details, DLL file troubleshooting instructions for problems with mstlsapi.dll, and a comprehensive set of free downloads for every file version that has been catalogued by our team.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	mstlsapi.dll
File Extension:	DLL file extension
Description:	Microsoft® Terminal Server Licensing
Object File Type:	Executable application
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:	0x18f48
Code Size:	129024

View Other mstlsapi.dll Information

File Info	Description
File Size:	136 kB
File Modification Date/Time:	2009:04:11 16:24:29+00:00
File Inode Change Date/Time:	2017:11:05 07:10:24+00:00
File Type:	Win64 DLL
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2009:04:11 07:06:35+00:00
PE Type:	PE32+
Linker Version:	8.0
Code Size:	129024
Initialized Data Size:	10752
Uninitialized Data Size:	0
Entry Point:	0x18f48
OS Version:	6.0
Image Version:	6.0
Subsystem Version:	6.0
Subsystem:	Windows GUI
File Version Number:	6.0.6002.18005
Product Version Number:	6.0.6002.18005
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows NT 32-bit
Object File Type:	Executable application
File Subtype:	0
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Microsoft Corporation
File Description:	Microsoft® Terminal Server Licensing
File Version:	6.0.6002.18005 (lh_sp2rtm.090410-1830)
Internal Name:	mstlsapi.dll
Legal Copyright:	© Microsoft Corporation. All rights reserved.
Original Filename:	mstlsapi.dll
Product Name:	Microsoft® Windows® Operating System
Product Version:	6.0.6002.18005

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

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What are mstlsapi.dll Error Messages?

Dynamic Link Library mstlsapi.dll Errors

mstlsapi.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like mstlsapi.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 mstlsapi.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 mstlsapi.dll is attempted to be loaded either when Windows is starting up, or in some cases already running. Some of the most common mstlsapi.dll errors include:

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

Your mstlsapi.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, mstlsapi.dll file corruption could be caused from a power outage when loading Windows, system crash while loading mstlsapi.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 mstlsapi.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 mstlsapi.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 mstlsapi.dll error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing mstlsapi.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 mstlsapi.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 mstlsapi.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 mstlsapi.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 mstlsapi.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 mstlsapi.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 mstlsapi.dll file version. We maintain a comprehensive database of 100% malware-free mstlsapi.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 mstlsapi.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\

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 Vista.

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

CAUTION : We strongly advise against downloading and copying mstlsapi.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 mstlsapi.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

mstlsapi.dll

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:	116224
File Date:	04/14/2008
MD5 Checksum:	2d65d56c2f8b6cc5ebff8e7200c30304
SHA1 Checksum:	a88f24cb797bb85aba9ea841103faae3677188a7
SHA256 Checksum:	10cd5ff00d110d1ae2313dbcbdb17c2b9dff930f5dad65c35c08fcf9c152c053
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:	10752
Linker Version:	7.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	4.0
File Modification Date/Time:	04/14/2008

Windows Vista

File Name

Software Version

File Version

Architecture

mstlsapi.dll

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
File Size:	84992
MD5 Checksum:	ee60fc8f65b94c392de0f75533c014fb
SHA1 Checksum:	2feee3dd021fa08a9351a117690acff3b24d5a23
SHA256 Checksum:	28266e2f196363ac13d06421172a530e09fc5d4a8f23d9d2018d5dc580bb1673
CRC32:
File Directory Location:	C:\Windows\SysWOW64\

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

mstlsapi.dll

6.0.6002.18005

6.0.6002.18005 (lh_sp2rtm.090410-1830)

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
Software:	Microsoft® Windows® Operating System
Software Version:	6.0.6002.18005
File Version:	6.0.6002.18005 (lh_sp2rtm.090410-1830)
File Size:	139264
File Date:	04/11/2009
MD5 Checksum:	0ddd4dde7c1fd5c3c8c4cb378cc9766f
SHA1 Checksum:	539a7bd4380510f1cb01664f6bd4827155e96467
SHA256 Checksum:	fda5d29ccddf5b653e0dd564853fbc47986101113f06a9799eb5ab86ef3f4ebc
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	6.0
Initialized Data Size:	10752
Linker Version:	8.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	6.0
File Modification Date/Time:	04/11/2009

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mshtml.dll	Microsoft (R) HTML Viewer	Windows® Internet Explorer (7.00.6002.18005)	5686272	C:\Windows\System32\Sysprep\Panther\

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OneX_v1.xsd	XML Schema Definition	Windows 7	5957	C:\Windows\L2Schemas\
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WLANAP_profile_v1.xsd	XML Schema Definition	Windows 8.1	7548	C:\Windows\L2Schemas\

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