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OPA11.BAK - How to Fix? Download Now

Sometimes Windows system displays error messages regarding corrupted or missing OPA11.BAK 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 OPA11.BAK file can therefore effect in failed execution of the started process.

OPA11.BAK file General Backup. 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 OPA11.BAK related errors on your device. You can also download OPA11.BAK file compatible with Windows XP devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows XP

File info

General information
Filename OPA11.BAK
File extension BAK
Type Backup
Description General Backup
Software
Program Office 2003
Software Office
Author Microsoft
Software version 2003
Details
File size 8200
Oldest file 2017-05-10
Latest file 2017-05-10
OPA11.BAK

There are various types of errors related to OPA11.BAK file. OPA11.BAK 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 OPA11.BAK file. If you encounter one listed below (or similar), please consider the following suggestions.

  • OPA11.BAK is corrupted
  • OPA11.BAK cannot be located
  • Runtime Error - OPA11.BAK
  • OPA11.BAK file error
  • OPA11.BAK file cannot be loaded. Module was not found
  • cannot register OPA11.BAK file:
  • OPA11.BAK file could not be loaded
  • OPA11.BAK file doesn't exist

OPA11.BAK

Error

Application could not be started because OPA11.BAK file is missing. Reinstall the application to solve the problem.

OK

Problems related to OPA11.BAK 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 OPA11.BAK 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.

OPA11.BAK 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 OPA11.BAK 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 OPA11.BAK 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 OPA11.BAK 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 OPA11.BAK file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the OPA11.BAK 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 OPA11.BAK 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 OPA11.BAK 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 OPA11.BAK file

The last solution is to manually download and replace OPA11.BAK 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 OPA11.BAK file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of OPA11.BAK file example directory paths.

  • Windows XP: C:\Documents and Settings\All Users\Application Data\Microsoft\OFFICE\DATA\

If the steps did not solve your OPA11.BAK 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 OPA11.BAK
System Windows XP
File size 8200 bytes
Date 2017-05-10
File details
MD5 8b7a6fc84edbb9b9c2164f3227a8c945
SHA1 9ab615853fa8c7b08a012187a733dc39585ac297
SHA256 6119a9887692fb85eabc996f065b03c6d19bafc23f00a4794242e72b13120bd0
CRC32 5deaba53
Example file location C:\Documents and Settings\All Users\Application Data\Microsoft\OFFICE\DATA\