Troubleshooting 521.msstyles: How To Guide (Free Download)

Last Updated: 11/25/2023
[Reading Time Required: 3.5 minutes]

The development of luna Theme for Windows by TGT Soft prompted the latest creation of 521.msstyles. It is also known as a luna Theme for Windows file (file extension MSSTYLES), which is classified as a type of Win32 DLL (Executable application) file.

521.msstyles was first developed on 12/30/2006 for the Windows 10 Operating System in Style XP 3.19. According to our records, this is the primary and most recent file release from TGT Soft.

Continue reading below to discover detailed file information, MSSTYLES file troubleshooting, and free downloads of several versions of 521.msstyles.

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File Overview


General Information
File Name: 521.msstyles
File Extension: MSSTYLES file extension
Description: luna Theme for Windows
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
Software Program: luna Theme for Windows
Legal Copyright: Copyright © 2000
File Details
Character Set: Unicode
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x0000


What are 521.msstyles Error Messages?


Dynamic Link Library 521.msstyles Errors

521.msstyles is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like 521.msstyles, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like convert.exe - to follow. These files were created so that multiple programs (eg. Style XP) could share the same 521.msstyles 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 MSSTYLES 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 521.msstyles is attempted to be loaded either when Style XP is starting up, or in some cases already running. Some of the most common 521.msstyles errors include:

Your 521.msstyles file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Style XP), or deleted by a malware infection. Furthermore, 521.msstyles file corruption could be caused from a power outage when loading Style XP, system crash while loading 521.msstyles, 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 521.msstyles 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 521.msstyles 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 521.msstyles error, please proceed to the Step 2 below.

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

You can uninstall Style XP 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 Style XP 3.19 and click "Uninstall"
  5. Follow the prompts for uninstallation.

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

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

Style XP 3.19

TGT Soft

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 521.msstyles 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 521.msstyles 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 521.msstyles 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 521.msstyles file version. We maintain a comprehensive database of 100% malware-free 521.msstyles files for every applicable version of Style XP. 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 521.msstyles Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Style XP folder location:
    Windows 10: C:\Windows\Resources\Themes\521\
  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 521.msstyles 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 521.msstyles Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying 521.msstyles to your appropriate Windows system directory. TGT Soft typically does not release Style XP MSSTYLES 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 521.msstyles and all other MSSTYLES files for Style XP. An incorrectly installed MSSTYLES 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 521.msstyles


MSSTYLES Files Related to 521.msstyles

File Name Description Software Program (Version) File Size (bytes) File Location
Gem.msstyles Windows XP Style Style XP 3.19 1704080 C:\Program Files\WindowsApps\Microsoft.WindowsS...
Blade.msstyles Windows XP Style Style XP 3.19 1749136 C:\Program Files\WindowsApps\Microsoft.WindowsS...
Panther.msstyles luna Theme for Windows luna Theme for Windows (1, 0, 0, 1) 2801808 C:\Program Files\WindowsApps\Microsoft.GetHelp_...
521.msstyles luna Theme for Windows luna Theme for Windows (1, 0, 0, 1) 839824 C:\Program Files\WindowsApps\Microsoft.StorePur...
Watercolor.msstyles Watercolor Visual Style for Windows XP Watercolor Visual Style for Windows XP (3, 0, 0, 0) 2715792 C:\Program Files\WindowsApps\Microsoft.VCLibs.1...

Other Files Related to 521.msstyles

File Name Description Software Program (Version) File Size (bytes) File Location
CBS.log Log Style XP 3.19 888726 C:\Windows\Logs\CBS\
SA.DAT Game Data Style XP 3.19 6 C:\WINDOWS\Tasks\
setupapi.dev.log Log Style XP 3.19 684126 C:\Windows\inf\
WmiApRpl.h C/C++/Objective-C Header Style XP 3.19 3444 C:\Windows\System32\wbem\Performance\
api-ms-win-core-heap-l... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 18248 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...


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