Fix: ERROR_BAD_FUNCTION_TABLE 559 (0x22F)

Repairing system files is the quickest fix

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ERROR_BAD_FUNCTION_TABLE
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The ERROR_BAD_FUNCTION_TABLE Windows system error, with code 559 (0x22F), is typically encountered when the PC detects a corrupt, invalid, or malformed function table during the process of unwinding. The message reads, A malformed function table was encountered during an unwind operation.

Common reasons for Error Bad Function Table include corrupted system files, outdated or corrupted drivers, malware infection, and conflicts triggered by third-party software.

Before you move to the slightly complex solutions, restart the PC and install all pending Windows updates. For most of you, these basic checks should do the trick!

How can I fix ERROR_BAD_FUNCTION_TABLE in Windows?

1. Repair the corrupted system files

  1. Press Windows + S to open Search, type Command Prompt, and click on Run as administrator.
  2. Click Yes in the UAC prompt.
  3. Paste the following DISM commands individually and hit Enter after each: DISM /Online /Cleanup-Image /CheckHealth DISM /Online /Cleanup-Image /ScanHealth DISM /Online /Cleanup-Image /RestoreHealth
  4. Now, run this command for the SFC scan: sfc /scannowsfc scan to fix ERROR_BAD_FUNCTION_TABLE
  5. Finally, reboot the PC to apply the changes.

Corrupted system files are the most common reason behind ERROR_BAD_FUNCTION_TABLE and other system errors in Windows. To fix this, run the DISM (Deployment Image Servicing and Management) and SFC (System File Checker) scans, which will replace all affected files with their cached copies!

2. Update all the drivers

  1. Press Windows + X to open the Power User menu, and select Device Manager.
  2. Expand the entries here, right-click on the devices listed underneath individually, and select Update driver.update driver to fix ERROR_BAD_FUNCTION_TABLE
  3. Click on Search automatically for drivers and wait for Windows to install the best locally available version.automatic driver search
  4. Similarly, update all the drivers and then reboot the computer.

Outdated or corrupt drivers remain the second most common reason behind ERROR_BAD_FUNCTION_TABLE in Windows. So, update all the drivers!

If Windows can’t find a better version, go to the manufacturer’s website, locate the new releases, and then manually install the latest driver.

3. Scan the PC for malware

  1. Press Windows + S to open Search, type Windows Security, and click on the relevant result.
  2. Click on Virus & threat protection.windows security
  3. Click on Scan options.
  4. Select the Full scan entry and then click on Scan now.malware scan to fix ERROR_BAD_FUNCTION_TABLE
  5. Wait for the scan to complete. It usually takes 15-30 minutes.

4. Uninstall conflicting software

  1. Press Windows + R to open Run, type appwiz.cpl in the text field, and hit Enter.
  2. Select any third-party security software or app(s) installed around the same time the system error first appeared, and click on Uninstall.uninstall to fix ERROR_BAD_FUNCTION_TABLE
  3. Follow the on-screen instructions to complete the process and then restart the computer.

If a quick removal doesn’t work, files and Registry entries left by the app are to blame. In this case, I recommend using a top-rated software uninstaller to wipe all traces of the previous installation.

5. Perform a system restore

  1. Press Windows + S to open Search, type Create a restore point, and click on the relevant result.
  2. Click on System Restore.restore to fix ERROR_BAD_FUNCTION_TABLE
  3. Select the Choose a different restore point option, if available, and click Next.restore point
  4. Pick the oldest restore point from the list, and click Next.oldest restore point
  5. Verify the restore details, click on Finish, and confirm the change.

When nothing else works, a system restore will help by reverting any recent misconfigurations on the PC. Just make sure to choose a restore point created before the error first appeared.

Remember, system errors like ERROR_BAD_FUNCTION_TABLE usually arise due to software-based underlying causes. So, that’s what you should focus on. Besides, advanced users can check the Windows error logs and identify the fault.

Before you leave, discover the best performance settings for Windows 11 and enjoy an error-free experience!

For any queries or to share more fixes with our readers, drop a comment below.

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