Unable to start the ‘AblebitsMakediffs.exe’ application

Configure Microsoft Defender or Windows Defender to use Compare Sheets

When you try to use the Compare Sheets tool, it may keep failing with the following error message:

Error message.

The reason may be that in your Microsoft Defender or Windows Defender settings, the Block all Office applications from creating child processes rule is enabled. Take steps 1-6 to find out if this is the case. If yes, proceed to steps 7-9 to solve the problem. If you do not find the rule enabled, please contact us at support@ablebits.com

  1. Click the Start button, type "Edit group policy" into the Search field, click Open:
    Type Edit group policy.

  2. In the tree, go to Computer Configuration → Administrative Templates → Windows Components:
    Open Windows Components.
  3. In Windows Components, look for the Microsoft Defender Antivirus or Windows Defender Antivirus folder (Microsoft Defender Antivirus is the new name of Windows Defender, so it depends on the Windows version you use).

    • If you find Microsoft Defender Antivirus, go to Microsoft Defender Exploit Guard → Attack Surface Reduction:
      Microsoft Defender.
    • If you find Windows Defender Antivirus, go to Windows Defender Exploit Guard → Attack Surface Reduction:
      Windows Defender.
  4. Double-click Configure Attack Surface Reduction rules:
    Configure Attack Surface Reduction rules.
  5. In the Configure Attack Surface Reduction rules window, tick Enabled and click the Show button:
    Click Show.
  6. Check if there is the D4F940AB-401B-4EFC-AADC-AD5F3C50688A rule:
    Check the D4F940AB-401B-4EFC-AADC-AD5F3C50688A rule.

    • If you can see this rule (as shown on the screenshot above), take the following steps.
    • If there is no such a rule but you got the Unable to start the ‘AblebitsMakediffs.exe’ application error message, please contact us at support@ablebits.com
  7. We do not recommend you to disable the rule, but to let the add-in work correctly, you'll need to add Ultimate Suite to exclusions.

    Close the Show Contents and Configure Attack Surface Reduction rules windows. Double-click Exclude files and paths from Attack Surface Reduction Rules:
    Exclude files and paths from Attack Surface Reduction Rules.

    Tick Enabled and click Show:
    Exclude files and paths from Attack Surface Reduction Rules.

  8. Copy the Ultimate Suite installation directory. If you haven't changed it while installation, it should be the following:

    C:\Program Files (x86)\Ablebits\Ultimate Suite for Microsoft Excel

    Copy path.

  9. Paste the installation path into the Value name field, enter "1" as a Value, and click OK:

    Enter the Value name.

    Note. If there are VBA macros in Excel files that you compare, you'll have to add these books to exclusions as well. For this, copy and paste the path to the books the same way as you did for Ultimate Suite. Into the Value field, enter "1". If the books are saved to Desktop, simply enter "Desktop" into the Value name.
  10. Run Compare Two Sheets again. If the problem is not solved, please message us for further investigations: support@ablebits.com

Ask a question (posted publicly)

If you have any questions or issues with this add-in, please feel free to post your concerns in the comments area. As soon as we answer, a notification message will be sent to your e-mail. If you do not want to share your thoughts in public, please contact us at support@ablebits.com.