Qihoo 360 Technology 360 Total Security DLL appd.dll

Appd.dll DLL Errors: Download and Troubleshoot

Last Updated: 11/25/2023
[Average Read Time: 4.5 minutes]

appd.dll, also known as a 360 Total Security Proactive Defense file, was created by Qihoo 360 Technology for the development of 360 Total Security. DLL files fall under under the Win32 DLL (Dynamic link library) file type category.

appd.dll was initially released with 360 Total Security 10.6.0.1223 on 10/12/2019 for the Windows 10 Operating System. This is not only most recent release from Qihoo 360 Technology, but it's the only version known in existence.

Please see below for more detailed information, DLL file troubleshooting instructions, and free downloads of different versions of appd.dll.

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File Overview


General Information ✻
File Name: appd.dll
File Extension: DLL file extension
Description: 360 Total Security Proactive Defense
Object File Type: Dynamic link library
File Operating System: Windows NT 32-bit
MIME Type: application/octet-stream
User Popularity Rating:
 
Developer and Software Information
Software Developer: Qihu 360 Software Co., Ltd.
Software Program: 360 Total Security
Legal Copyright: Copyright © 2019 Qihu 360 Software Co., Ltd.
File Details
Character Set: Unicode
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x92462
Code Size: 716800
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What are appd.dll Error Messages?


Dynamic Link Library appd.dll Errors

appd.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like appd.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like MpSigStub.exe - to follow. These files were created so that multiple programs (eg. 360 Total Security) could share the same appd.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 appd.dll is attempted to be loaded either when 360 Total Security is starting up, or in some cases already running. Some of the most common appd.dll errors include:

Your appd.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with 360 Total Security), or deleted by a malware infection. Furthermore, appd.dll file corruption could be caused from a power outage when loading 360 Total Security, system crash while loading appd.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 appd.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 appd.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):

  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 appd.dll error, please proceed to the Step 2 below.

Step 2: If recently installed 360 Total Security (or related software), uninstall then try reinstalling 360 Total Security software.

You can uninstall 360 Total Security 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 360 Total Security 10.6.0.1223 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall 360 Total Security software.

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

360 Total Security 10.6.0.1223

Qihoo 360 Technology

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 appd.dll 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 appd.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 appd.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 appd.dll file version. We maintain a comprehensive database of 100% malware-free appd.dll files for every applicable version of 360 Total Security. 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 appd.dll Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate 360 Total Security folder location:
    Windows 10: C:\Program Files (x86)\360\Total Security\ipc\
  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 appd.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 appd.dll Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying appd.dll to your appropriate Windows system directory. Qihoo 360 Technology typically does not release 360 Total Security 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 appd.dll and all other DLL files for 360 Total Security. 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 10
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Files Related to appd.dll


DLL Files Related to appd.dll

File Name Description Software Program (Version) File Size (bytes) File Location
360net.dll 360 Security Center Network Module 360 Security Center (1, 2, 0, 1270) 491072 C:\Program Files\WindowsApps\Microsoft.Microsof...
api-ms-win-core-proces... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 13160 C:\Users\Tester\AppData\Local\
safemonhlp.dll 360 Internet Security Internet Protection 360 Internet Security (1, 0, 0, 1265) 147368 C:\Program Files\WindowsApps\Microsoft.Microsof...
Microsoft.Support.SDK.dll Dynamic Link Library 360 Total Security 10.6.0.1223 1512448 C:\Program Files (x86)\Common Files\microsoft s...
360zipc.dll 360 Internet Security Internet Protection 360 Internet Security (1, 2, 0, 1230) 644720 C:\Program Files\WindowsApps\Microsoft.Microsof...

Other Files Related to appd.dll

File Name Description Software Program (Version) File Size (bytes) File Location
WmiApRpl.ini Windows Initialization 360 Total Security 10.6.0.1223 29736 C:\Windows\inf\WmiApRpl\0009\
api-ms-win-core-profil... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 10600 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
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 360 Total Security 10.6.0.1223 5718 C:\Windows\System32\Sysprep\Panther\
diagerr.xml Extensible Markup Language 360 Total Security 10.6.0.1223 44109 C:\Windows\Panther\UnattendGC\


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