How to Fix Excel Blocking the Excel-DNA XFunctions Add-In
Question details
The user is attempting to install the Excel-DNA XFunctions add-in to use XLOOKUP-related formulas, but Excel silently blocks the add-in from loading.
- Product
- Microsoft Excel
- Device & OS
- Windows
- Scenario
- Trying to run the downloaded Excel-DNA XFunctions .xll file to enable missing modern formulas in an older version of Excel.
- Observed behavior
- The add-in fails to load and the formulas do not work, with no error message or notification being displayed by the application.
Ensure you have downloaded the correct add-in version (32-bit or 64-bit) that matches your Excel installation from the official Excel-DNA GitHub repository.
Unblock the Add-In File in Windows Properties
Windows automatically blocks executable files and add-ins downloaded from the internet. Unblocking the file allows Excel to recognize and run it.
When you download .xll files directly from a browser, Windows tags them with a 'Mark of the Web' for security. Microsoft Excel respects this tag and will prevent the add-in from loading, often without showing any error dialog.
Close Excel completely. Open Windows File Explorer and navigate to the folder where you saved the Excel-DNA XFunctions .xll file (typically the Downloads folder).
Right-click the downloaded add-in file and select 'Properties' from the context menu.
On the 'General' tab, look at the bottom for a 'Security' section. Check the box that says 'Unblock', then click 'Apply' and 'OK'.
Double-click the .xll file to open it in Excel, then open another workbook to verify if the XLOOKUP functionality is working correctly.
Adjust Excel Trust Center Security Settings
If unblocking the file does not work, Excel's internal strict security policies for macros and add-ins might be preventing it from running.
Use WPS Office to Enjoy Native XLOOKUP Support for Free
Stop struggling with third-party add-ins and security blocks. WPS Spreadsheet offers native, built-in support for advanced functions like XLOOKUP without requiring additional downloads or risky security tweaks.
- 1. Download and install: Download WPS Office for free from the official website and complete the quick installation process.
- 2. Open your spreadsheet: Launch WPS Spreadsheet and open your existing .xlsx files directly without any conversion.
- 3. Use XLOOKUP instantly: Type =XLOOKUP in any cell to instantly access the function, with full parameter tooltips and identical syntax to Microsoft Office.
Frequently Asked Questions
Why didn't Excel show an error message when blocking the add-in?
If your macro security settings in the Trust Center are set to 'Disable all macros without notification', Excel will silently block add-ins that contain unverified code. Changing this to 'Disable all macros with notification' will allow Excel to prompt you.
Which version of the XFunctions add-in do I need?
You must download the version that matches your Excel installation's architecture, not your Windows OS. Use the 64-bit (.xll64) version if you have 64-bit Excel installed, or the standard 32-bit (.xll) version for 32-bit Excel.
Can I leave the add-in in my Downloads folder?
While it can run from the Downloads folder, it is not recommended. Moving the file to a permanent, trusted location on your drive ensures that Excel can reliably find and load the add-in every time you launch the application.
