Bitdefender BitDefender DLL otcore.dll

Otcore.dll Download and Repair: Troubleshooting DLL Errors

Last Updated: 11/27/2023
[Time Required for Reading: 3.5 minutes]

The development of Bitdefender by Bitdefender prompted the latest creation of otcore.dll. It is also known as a Bitdefender Antispam Core file (file extension DLL), which is classified as a type of Win64 DLL (Dynamic link library) file.

The initial introduction of otcore.dll released in BitDefender 1.0.14.74 was for Windows 10 on 12/03/2018. This is not only most recent release from Bitdefender, but it's the only version known in existence.

Below, you find comprehensive file information, instructions for simple DLL file troubleshooting, and list of free otcore.dll downloads for each available file version.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	otcore.dll
File Extension:	DLL file extension
Description:	Bitdefender Antispam Core
Object File Type:	Dynamic link library
File Operating System:	Win32
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Bitdefender
Software Program:	Bitdefender
Legal Copyright:	Copyright © Bitdefender

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x0017
Entry Point:	0x4bd3
Code Size:	652800

View Other otcore.dll Information

File Info	Description
File Size:	918 kB
File Modification Date/Time:	2020:01:23 07:33:52+00:00
File Type:	Win64 DLL
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2019:11:27 13:53:52+00:00
PE Type:	PE32+
Linker Version:	14.0
Code Size:	652800
Initialized Data Size:	619008
Uninitialized Data Size:	0
Entry Point:	0x4bd3
OS Version:	5.2
Image Version:	0.0
Subsystem Version:	5.2
Subsystem:	Windows command line
File Version Number:	2.16.1.704
Product Version Number:	2.16.1.704
File Flags Mask:	0x0017
File Flags:	(none)
File OS:	Win32
Object File Type:	Dynamic link library
File Subtype:	0
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Bitdefender
File Description:	Bitdefender Antispam Core
File Version:	2.16.1.704 (r42965a53c8470e13254aa454ae771ff822843ac2)
Internal Name:	Antispam Core
Legal Copyright:	Copyright © Bitdefender
Product Name:	Bitdefender
Product Version:	2.16.1.704 (r42965a53c8470e13254aa454ae771ff822843ac2)

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

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What are otcore.dll Error Messages?

Dynamic Link Library otcore.dll Errors

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

Access Violation at address - otcore.dll.
otcore.dll could not be found.
Cannot find C:\Program Files\Bitdefender Antivirus Free\Signatures\OTEngines\OTEngines_000_000\otcore.dll.
Cannot register otcore.dll.
Cannot start BitDefender. A required component is missing: otcore.dll. Please install BitDefender again.
Failed to load otcore.dll.
The application has failed to start because otcore.dll was not found.
The file otcore.dll is missing or corrupt.
This application failed to start because otcore.dll was not found. Re-installing the application may fix this problem.

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

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

You can uninstall BitDefender 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 BitDefender 1.0.14.74 and click "Uninstall"
Follow the prompts for uninstallation.

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

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

BitDefender 1.0.14.74

Bitdefender

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 otcore.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 otcore.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 otcore.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 otcore.dll file version. We maintain a comprehensive database of 100% malware-free otcore.dll files for every applicable version of BitDefender. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download otcore.dll Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy this file to the appropriate BitDefender folder location:

Windows 10: C:\Program Files\Bitdefender Antivirus Free\Signatures\OTEngines\OTEngines_000_000\
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 otcore.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 otcore.dll Files (Malware-Tested 100% Clean)

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

BitDefender 1.0.14.74

BitDefender 1.0.14.74

File Name

Software Version

File Version

Architecture

otcore.dll

2.16.1.704

2.16.1.704 (r42965a53c8470e13254aa454ae771ff822843ac2)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Bitdefender
Software Version:	2.16.1.704
File Version:	2.16.1.704 (r42965a53c8470e13254aa454ae771ff822843ac2)
File Size:	939760
File Date:	01/23/2020
MD5 Checksum:	c34d41d1c0593eb855e3867fa1c463e1
SHA1 Checksum:	fc57c3b91657c8620c06c6d0b582dbd0808a5804
SHA256 Checksum:	88694649ac343c78f8329df4eaa5f1f48524c402a76bbf72d34c55b4659c4752
CRC32:
File Directory Location:	C:\Program Files\Bitdefender Antivirus Free\Si ...

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	0.0
Initialized Data Size:	619008
Linker Version:	14.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows command line
Subsystem Version:	5.2
File Modification Date/Time:	01/23/2020

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Files Related to otcore.dll

DLL Files Related to otcore.dll

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
api-ms-win-core-memory...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.17134.12)	11624	C:\$WINDOWS.~BT\Sources\Boot\EFI\hr-HR\
smtp.dll	smtp.dll	Bitdefender (1.0.1.350)	42576	C:\Windows\System32\winevt\Logs\
FileSync.LocalizedReso...	Microsoft OneDrive	Microsoft OneDrive (19.222.1110.0006)	186216	C:\Users\Tester\AppData\Local\Microsoft\Windows\
SymSrv.dll	Symbol Server	Microsoft® Windows® Operating System (6.3.9600.17298)	142992	C:\Windows\System32\wbem\Repository\
api-ms-win-crt-utility...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.17134.12)	11624	C:\Users\Tester\AppData\Local\

Other Files Related to otcore.dll

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
CBS.log	Log	BitDefender 1.0.14.74	1226468	C:\Windows\Logs\CBS\
api-ms-win-core-sysinf...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.17134.12)	19720	C:\Program Files\Bitdefender Antivirus Free\
diagerr.xml	Extensible Markup Language	BitDefender 1.0.14.74	5718	C:\Windows\System32\Sysprep\Panther\
api-ms-win-core-memory...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.17134.12)	19208	C:\Program Files\Bitdefender Antivirus Free\
EtwRTEventLog-System.etl	Microsoft Event Trace Log	BitDefender 1.0.14.74	432	C:\Windows\System32\LogFiles\WMI\RtBackup\

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