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Troubleshoot A0000021.hhk Errors and Download File

Sometimes Windows system displays error messages regarding corrupted or missing A0000021.hhk files. Situations like that can occur, for example, during a software installation process. Each software program requires certain resources, libraries, and source data to work properly. Corrupted or nonexistent A0000021.hhk file can therefore effect in failed execution of the started process.

A0000021.hhk file HTML Help Index. The file was developed by Microsoft for use with Office software. Here you will find detailed information about the file and instructions how to proceed in the event of A0000021.hhk related errors on your device. You can also download A0000021.hhk file compatible with Windows XP devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows XP
User popularity

Fix A0000021.hhk errors

File info

General information
Filename A0000021.hhk
File extension HHK
Type System
Description HTML Help Index
Software
Program Office 2003
Software Office
Author Microsoft
Software version 2003
Details
File size 20016
Oldest file 2017-05-10
MIME type text/html
A0000021.hhk

There are various types of errors related to A0000021.hhk file. A0000021.hhk file may be located in wrong file directory on your device, may not be present in the system, or may be infected with malicious software and therefore not work correctly. Below is a list of most common error messages related to A0000021.hhk file. If you encounter one listed below (or similar), please consider the following suggestions.

  • A0000021.hhk is corrupted
  • A0000021.hhk cannot be located
  • Runtime Error - A0000021.hhk
  • A0000021.hhk file error
  • A0000021.hhk file cannot be loaded. Module was not found
  • cannot register A0000021.hhk file:
  • A0000021.hhk file could not be loaded
  • A0000021.hhk file doesn't exist

A0000021.hhk

Error

Application could not be started because A0000021.hhk file is missing. Reinstall the application to solve the problem.

OK

Problems related to A0000021.hhk can be addressed in various ways. Some methods are meant only for advanced users. If you don't have confidence in your skills, we suggest consulting a specialist. Fixing A0000021.hhk file errors should be approached with utmost caution for any mistakes can result in unstable or unproperly working system. If you have the necassary skills, please proceed.

A0000021.hhk file errors can be caused by various factors, so its is beneficial to try to fix them using various methods.

Step 1: Scan your computer for any malicious software

Virus Scan

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with A0000021.hhk file or any other Windows system files should be scanning the system for malicious software using an antivirus tool.

If by any chance you don't have any antivirus software installed on your system yet, you should do it immediately. Unprotected system is not only a source of file errors, but, more importantly, makes your system vulnerable to many dangers. If you don't know which antivirus tool to choose, consult this Wikipedia article – comparison of antivirus software.

Step 2: Update your system and drivers.

Windows Update

Installing relevant Microsoft Windows patches and updates may solve your problems related to A0000021.hhk file. Use dedicated Windows tool to perform the update.

  1. Go to the Windows "Start" menu
  2. Type "Windows Update" in the search field
  3. Choose the appropriate software program (name may vary depending on your system version)
  4. Check if your system is up to date. If any unapplied updates are listed, install them immediately.
  5. After the update has been done,restart your computer in order to complete the process.

Beside updating the system, it is recommended that you install latest device drivers, as drivers can influence proper working of A0000021.hhk or other system files. In order to do so, go to your computer or device producer's website where you will find information regarding latest driver updates.

Step 3: Use System File Checker (SFC) tool

System File Checker

System File Checker is a Microsoft Windows tool. As the name suggests, the tool is used for identyfing and addressing system file related errors, including those related to A0000021.hhk file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the A0000021.hhk file with properly working version. To use the tool:

  1. Go to the Windows "Start" menu
  2. Type "cmd" in the search field
  3. Locate "Command Prompt" result – don't run it yet:
  4. Click the right mouse button and select "Run as Administrator" option
  5. Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Windows Recovery

Another approach is to restore system to previous state, before the A0000021.hhk file error occured. In order to restore your system, follow the instructions below

  1. Go to the Windows "Start" menu
  2. Type "System Restore" in the search field
  3. Start the system restore tool – it's name may differ depending on version of the system
  4. The application will guide you through the process – read the messages carefully
  5. After the process has finished, restart your computer.

If all the above-mentioned methods failed and the A0000021.hhk file problem has not been resolved, proceed to the next step. Remember that the following steps are intended only for advanced users.

Download and replace A0000021.hhk file

The last solution is to manually download and replace A0000021.hhk file in appropriate folder on the disk. Select file version compatible with your operating system and click the "Download" button. Next, go to your web browser's "Downloaded" folder and copy the downloaded A0000021.hhk file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of A0000021.hhk file example directory paths.

  • Windows XP: C:\System Volume Information\_restore{B22D30E0-94DC-4BEA-9AF0-1DF57F85464B}\RP1\

If the steps did not solve your A0000021.hhk file problem, you should consult a professional. A probability exists that the error(s) might be device-related and therefore should be resolved at the hardware level. A fresh operating system installation might be necessary – a faulty system installation process can result in data loss.

File versions list

Filename A0000021.hhk
System Windows XP
File size 20016 bytes
Date 2017-05-10
Download
File details
MD5 372fa284e6ce95eae72a0b27d1dd1b62
SHA1 053b098c1ca72754166c822dbb915d1054cd7475
SHA256 c953a6f3615158f19b16d0f3189ae8f189fdec2ade9f0a70a1cf11f3437447bb
CRC32 67d46b84
Example file location C:\System Volume Information\_restore{B22D30E0-94DC-4BEA-9AF0-1DF57F85464B}\RP1\