Download and Repair Lang.dat Issues

Last Updated: 07/05/2023
[Time to Read Article: 5 minutes]

DAT files such as Lang.dat are categorized as Dynamic Link Library (Game Data) files. As a Game Data file, it was created for use in NetPerSec 2014.01.09 by Nayuki.

Lang.dat was first released in the Windows 10 Operating System on 09/24/2019 with Driver Booster The newest file release date for NetPerSec 2014.01.09 was 01/09/2014 [version 2014.01.09]. Lang.dat is found in NetPerSec 2014.01.09, Client for Google Translate 6.0.612, and Re-Volt demo demo.

Please continue reading to find your correct Lang.dat file version download (free), detailed file information, and DAT file troubleshooting instructions.

File Analysis Provided by Jason Geater (Author)

Recommended Download: Fix Lang.dat / NetPerSec-related registry issues with WinThruster.

Compatible with Windows 10, 8, 7, Vista, XP and 2000

Average User Rating


Optional Offer for WinThruster by Solvusoft
| EULA | Privacy Policy | Terms | Uninstall

File Overview

General Information
File Name: Lang.dat
File Extension: DAT file extension
File Type: Dynamic Link Library
Description: Game Data
User Popularity Rating:
Developer and Software Information
Software Program: NetPerSec 2014.01.09
Developer: Nayuki
Software: NetPerSec
Software Version: 2014.01.09
File Details
File Size (Bytes): 4557
Oldest File Date: 10/04/2019
Latest File Date: 02/04/2020

What are Lang.dat Error Messages?

Dynamic Link Library Lang.dat Errors

Lang.dat is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like Lang.dat, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like Setup.exe - to follow. These files were created so that multiple programs (eg. NetPerSec) could share the same Lang.dat 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 DAT 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 Lang.dat is attempted to be loaded either when NetPerSec is starting up, or in some cases already running. Some of the most common Lang.dat errors include:

Your Lang.dat file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with NetPerSec), or deleted by a malware infection. Furthermore, Lang.dat file corruption could be caused from a power outage when loading NetPerSec, system crash while loading Lang.dat, 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.

How to Fix Lang.dat 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 Lang.dat 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):

  1. Hit the Windows Start button
  2. When you see the search box, type "System Restore" and press "ENTER".
  3. In the search results, find and click System Restore.
  4. Please enter the administrator password (if applicable / prompted).
  5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
  6. Restore your computer to that backup image.

If the Step 1 fails to resolve the Lang.dat error, please proceed to the Step 2 below.

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

You can uninstall NetPerSec software by following these instructions (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for NetPerSec 2014.01.09 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall NetPerSec software.

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

NetPerSec 2014.01.09


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 Lang.dat error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

  1. Hit the Windows Start button
  2. In the search box, type "Update" and press "ENTER".
  3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
  4. If updates are available for download, click "Install Updates".
  5. After the update is completed, restart your PC.

If Windows Update failed to resolve the Lang.dat error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

If Those Steps Fail: Download and Replace Your Lang.dat 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 Lang.dat file version. We maintain a comprehensive database of 100% malware-free Lang.dat files for every applicable version of NetPerSec. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download Lang.dat Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate NetPerSec folder location:
    Windows 10: C:\Program Files (x86)\IObit\Smart Defrag\
    Windows 10: C:\Users\Tester\AppData\Local\Temp\RarSFX0\
    Windows 10: C:\Program Files (x86)\IObit\IObit Malware Fighter\
    Windows 10: C:\Users\Tester\AppData\Local\Temp\is-DIP58.tmp\
    Windows 10: C:\Program Files (x86)\IObit\Advanced SystemCare Ultimate\
    Show 8 more directories +
    Windows 10: C:\Program Files (x86)\IObit\IObit Uninstaller\
    Windows 10: C:\Program Files (x86)\IObit\Advanced SystemCare\
    Windows 10: C:\Program Files (x86)\cmcm\Clean Master\
    Windows 10: C:\Program Files (x86)\IObit\Driver Booster\7.0.2\
    Windows 10: C:\Users\Tester\Downloads\revoltgamespot\
    Windows 10: C:\Program Files (x86)\IObit\Advanced SystemCare\
    Windows 10: C:\Program Files (x86)\IObit\Classic Start\
    Windows 10: C:\Program Files (x86)\Translate Client\
  4. 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 Lang.dat 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.

Download Lang.dat Files (Malware-Tested 100% Clean)

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

Windows 10

Files Related to Lang.dat

DAT Files Related to Lang.dat

File Name Description Software Program (Version) File Size (bytes) File Location
{1E31891C-AE34-40D7-97... Game Data NetPerSec 2014.01.09 274944 C:\Users\Tester\AppData\Local\Packages\Microsof...
9WZDNCRFJBBG.dat Game Data NetPerSec 2014.01.09 465 C:\Windows\System32\config\systemprofile\AppDat...
ntuser.dat Game Data NetPerSec 2014.01.09 1310720 C:\Users\Tester\
DiscoverCacheData.dat Game Data NetPerSec 2014.01.09 984 C:\Users\Tester\AppData\Local\Microsoft\PenWork...
9WZDNCRFHWKN.dat Game Data NetPerSec 2014.01.09 472 C:\Windows\System32\config\systemprofile\AppDat...

Other Files Related to Lang.dat

File Name Description Software Program (Version) File Size (bytes) File Location
setuperr.log Log NetPerSec 2014.01.09 12889 C:\Windows\Logs\DPX\
WmiApRpl.h C/C++/Objective-C Header NetPerSec 2014.01.09 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...
EtwRTEventLog-System.etl Microsoft Event Trace Log NetPerSec 2014.01.09 432 C:\Windows\System32\LogFiles\WMI\RtBackup\
PerfStringBackup.INI Windows Initialization NetPerSec 2014.01.09 1321920 C:\Windows\System32\


Optional Offer for WinThruster by Solvusoft | EULA | Privacy Policy | Terms | Uninstall

Browse Other File Extensions in Alphabetical Order :   # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

You are downloading trial software. The purchase of a one-year software subscription at the price of $39.95 USD is required to unlock all software features. Subscription auto-renews at the end of the term (Learn more). By clicking the "Start Download" button above and installing "Software", I acknowledge I have read and agree to the Solvusoft End User License Agreement and Privacy Policy.