Resolve DATA_COHERENCY_EXCEPTION BSOD: Expert Fixes and Insights

The DATA_COHERENCY_EXCEPTION (bug check 0x00000055) presents itself as a troublesome blue screen error in Windows, often manifesting abruptly and leaving many users in distress. This error usually arises from corrupt system files, disk issues, conflicting third-party applications, or even malware infections. Unfortunately, due to its rarity, comprehensive resources discussing this problem tend to be scarce. In this article, we will explore several effective strategies for resolving the DATA_COHERENCY_EXCEPTION error, focusing primarily on common causes and solutions. It is vital for Windows users to be proactive in diagnosing and fixing system issues to maintain optimal performance and reliability.

Understanding the DATA_COHERENCY_EXCEPTION Error​

Before delving into the troubleshooting process, let's understand what leads to the DATA_COHERENCY_EXCEPTION error. Similar to other blue screen errors, this issue disrupts operations by initiating system crashes. Here are the primary causes that can trigger this blue screen:

1. Corrupt System Files: When essential system files become corrupt or missing, the operating system struggles to function correctly, which can lead to a blue screen.
2. Disk Issues: Problems with the hard drive, including bad sectors or failed components, can provoke the DATA_COHERENCY_EXCEPTION bug check.
3. Conflicting Applications: Certain third-party applications may conflict with Windows' operations, leading to instability.
4. Malware Infections: Malicious software can corrupt system files, leading to system errors and crashes.
5. Failed Driver Updates: Outdated or malfunctioning drivers can also result in various blue screen errors. By understanding these causes, users can better contextualize their troubleshooting endeavors.

   Steps to Fix the DATA_COHERENCY_EXCEPTION BSOD​

   Now, let's discuss several solutions that can help rectify the DATA_COHERENCY_EXCEPTION error.

   1. Repair the Corrupt System Files​

   Corrupted system files are often the primary culprits behind this error. One effective method for repairing them is to use the Deployment Image Servicing and Management (DISM) and System File Checker (SFC) tools. Here’s how to run them:
   • Open the Start Menu and search for "Command Prompt".
   • Right-click on Command Prompt and select "Run as administrator".
   • In the Command Prompt window, enter the following commands one by one and press Enter after each:
     Code:

     bash DISM /Online /Cleanup-Image /CheckHealth DISM /Online /Cleanup-Image /ScanHealth DISM /Online /Cleanup-Image /RestoreHealth

   • After the DISM commands finish, run the SFC scan:
     Code:

     bash sfc /scannow

   • Finally, restart your computer and check for improvements. Running these commands essentially scans the system for issues and replaces corrupt files with suitable versions.

     2. Fix Disk Issues with Check Disk​

     If the error is related to disk problems, the Check Disk utility can be a savior. Here's how to use it:
   • Open the Run dialog by pressing Windows + R.
   • Type cmd and press Ctrl + Shift + Enter to open as administrator.
   • Enter the command:
     Code:

     bash chkdsk /r

   • You may be prompted to schedule a scan for the next reboot. Press Y and hit Enter.
   • Restart your PC and let Check Disk run its course. The Check Disk utility scans the disk for errors and attempts to fix them, which can help resolve the DATA_COHERENCY_EXCEPTION error.

     3. Uninstall Conflicting Third-Party Apps​

     Conflicting applications can often lead to instability in your system. If you suspect any recent installations might be causing the issue, follow these steps:
   • Open the Run dialog (Windows + R), type appwiz.cpl, and hit Enter to access the Programs and Features window.
   • Identify the application that you suspect might be causing the conflict, select it, and click "Uninstall".
   • Follow the prompts to complete the uninstallation.
   • Restart your computer and check if the blue screen reoccurs. If the problem persists, consider removing any additional applications installed around the time the error started happening.

     4. Scan the PC for Malware​

     Malware can cause significant damage to system files. Running a full scan can mitigate these risks. Here’s how to do it:
   • Press Windows + S, type Windows Security, then open the application.
   • Navigate to Virus & threat protection and click on Scan options.
   • Select Full scan and begin the scan.
   • Follow any recommendations the software provides if threats are detected. Eliminating malware can be crucial in stabilizing your system and preventing future errors.

     5. Perform a System Restore​

     If all else fails, reverting your system to a previous state might resolve the problem. If you have system restore points created before the issue emerged, you can restore your system without losing personal files:
   • Press Windows + S, search for Create a restore point, and open it.
   • Click on System Restore and select Choose a different restore point.
   • Select the appropriate restore point and follow the prompts to revert your system settings. It’s important to note that if you do not have any restore points available, you may need to consider reinstalling Windows, which could lead to data loss.

     Conclusion​

     The DATA_COHERENCY_EXCEPTION blue screen error can be a daunting challenge for many Windows users. However, understanding its causes and knowing how to implement effective solutions can significantly reduce downtime and maintain system reliability. Whether it’s running DISM and SFC scans, checking disk health, uninstalling conflicting applications, scanning for malware, or restoring your system, these steps can help you regain control of your Windows environment. For continued support and updates on Windows-related issues, feel free to participate in the WindowsForum.com community, where users share their experiences and solutions. For further reading, you can consult the original article on Windows Report here: DATA_COHERENCY_EXCEPTION Blue Screen Error [Solved].