Kovid Goyal Calibre EXE calibre-parallel.exe

How to Download Calibre-parallel.exe and Fix Runtime Error Messages

Last Updated: 11/24/2023
[Time Needed for Reading: ~4-6 minutes]

calibre-parallel.exe uses the EXE file extension, which is more specifically known as a calibre worker process file. It is classified as a Win32 EXE (Executable application) file, created for calibre by Kovid Goyal.

The first release in the Windows 10 Operating System for calibre-parallel.exe was on 10/18/2019 inside Calibre 4.2.0. This file marks the latest update from Kovid Goyal, according to our records.

Please see below for more detailed information, EXE file troubleshooting instructions, and free downloads of different versions of calibre-parallel.exe.

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File Overview


General Information ✻
File Name: calibre-parallel.exe
File Extension: EXE file extension
Description: calibre worker process
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: calibre-ebook.com
Software Program: calibre
Legal Copyright: GNU GPL v3.0
File Details
Character Set: Windows, Latin1
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x126c
Code Size: 1024
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What are calibre-parallel.exe Error Messages?


calibre-parallel.exe Runtime Errors

Runtime errors are Calibre errors that occur during "runtime". Runtime is pretty self-explanatory; it means that these EXE errors are triggered when calibre-parallel.exe is attempted to be loaded either when Calibre is starting up, or in some cases already running. Runtime errors are the most common form of EXE error you will encounter using Calibre.

In most cases, calibre-parallel.exe runtime errors occurring while the program is running will result in the program terminating abnormally. Most of these calibre-parallel.exe error messages mean that Calibre was either unable to locate this file on startup, or the file is corrupt, resulting in a prematurely-aborted startup process. Generally, Calibre will be unable to start without resolving these errors.

Some of the most common calibre-parallel.exe errors include:

  • calibre-parallel.exe - Bad Image.
  • calibre-parallel.exe Application Error.
  • calibre-parallel.exe could not be found.
  • calibre-parallel.exe could not be installed.
  • calibre-parallel.exe could not be launched. Class not registered.
  • calibre-parallel.exe could not be started.
  • calibre-parallel.exe failed to initialize properly.
  • calibre-parallel.exe has encountered a problem and needs to close. We are sorry for the inconvenience.
  • calibre-parallel.exe is not a valid Win32 application.
  • calibre-parallel.exe is not running.
  • Cannot find calibre-parallel.exe.
  • Error starting program: calibre-parallel.exe.
  • Faulting Application Path: calibre-parallel.exe.
  • The file calibre-parallel.exe is missing or corrupt.
  • Windows failed to start - calibre-parallel.exe.
System Error


The program can’t start because calibre-parallel.exe is missing from your computer. Try reinstalling the program to fix this problem.

Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

Finding the source of the calibre-parallel.exe error is key to properly resolving these errors. Although most of these EXE errors affecting calibre-parallel.exe will happen during startup, occasionally you will encounter a runtime error while using calibre. This can occur due to poor programming on behalf of calibre-ebook.com, conflicts with other software or 3rd-party plug-ins, or caused by damaged and outdated hardware. Also, these types of calibre-parallel.exe errors can occur if it has been accidentally moved, deleted, or corrupted by 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 calibre-parallel.exe 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 calibre-parallel.exe 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 calibre-parallel.exe error, please proceed to the Step 2 below.

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

You can uninstall Calibre 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 Calibre 4.2.0 and click "Uninstall"
  5. Follow the prompts for uninstallation.

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

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

Calibre 4.2.0

Kovid Goyal

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 calibre-parallel.exe 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 calibre-parallel.exe 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 calibre-parallel.exe 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 calibre-parallel.exe file version. We maintain a comprehensive database of 100% malware-free calibre-parallel.exe files for every applicable version of Calibre. 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 calibre-parallel.exe Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Calibre folder location:
    Windows 10: C:\Program Files (x86)\Calibre2\
  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 calibre-parallel.exe 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 calibre-parallel.exe Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying calibre-parallel.exe to your appropriate Windows system directory. Kovid Goyal typically does not release Calibre EXE 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 calibre-parallel.exe and all other EXE files for Calibre. An incorrectly installed EXE 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 calibre-parallel.exe


EXE Files Related to calibre-parallel.exe

File Name Description Software Program (Version) File Size (bytes) File Location
lrfviewer.exe Viewer for LRF files calibre (4.2.0) 88000 C:\Windows\Prefetch\
ebook-device.exe An executable program calibre (4.2.0) 30144 C:\Windows\Prefetch\
FileSyncConfig.exe Microsoft OneDrive Configuration Application Microsoft OneDrive (19.192.0926.0012) 364392 C:\Users\Tester\AppData\Local\Microsoft\Windows\
jpegtran-calibre.exe Windows Executable Calibre 4.2.0 484800 C:\Windows\Prefetch\
calibre-file-dialog.exe Helper program to show file open/save dialogs calibre (4.2.0) 43456 C:\Windows\Prefetch\

Other Files Related to calibre-parallel.exe

File Name Description Software Program (Version) File Size (bytes) File Location
api-ms-win-core-profil... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 10600 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
diagerr.xml Extensible Markup Language Calibre 4.2.0 5718 C:\Windows\System32\Sysprep\Panther\
api-ms-win-core-synch-... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 13160 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
EtwRTDiagLog.etl Microsoft Event Trace Log Calibre 4.2.0 24248 C:\Windows\System32\LogFiles\WMI\RtBackup\
PerfStringBackup.INI Windows Initialization Calibre 4.2.0 1321920 C:\Windows\System32\


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