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How to Fix Excel Startup Errors Caused by Missing Add-ins or Files

Natalie TaylorNatalie Taylor Nov 2, 2026 870 views

Question details

The user experiences recurring startup errors in Excel because the program is attempting to load a missing or deleted add-in, XLAM, XLA, or DLL file.

How to Fix Excel Startup Errors Caused by Missing Add-ins or Files
Product
Microsoft Excel
Device & OS
not provided
Scenario
Launching Excel for regular spreadsheet work.
Observed behavior
Excel repeatedly displays startup errors indicating it cannot find a specific file path or add-in when opening.
Before you start

Write down or take a screenshot of the exact file path and filename (such as a .xlam or .dll file) shown in the startup error message before proceeding.

Solution 1Recommended

Disable the Missing Add-in from Excel Options

Identify and disable the invalid add-in reference from Excel's options to prevent it from loading at startup.

When an add-in file is deleted from your computer without being disabled in Excel first, Excel will continue searching for it during startup. Removing the reference from the Add-ins menu will clear the error.

1
Open Excel Options

Launch Excel, close or ignore the startup error, and click on 'File' in the top-left corner, then select 'Options' at the bottom of the menu.

2
Navigate to Add-ins

Select 'Add-ins' from the left sidebar of the Excel Options window.

3
Manage Add-ins

At the bottom of the window, set the 'Manage' dropdown to 'Excel Add-ins' or 'COM Add-ins' (depending on the missing file type) and click the 'Go' button.

4
Remove the Reference

Locate the missing add-in in the list, uncheck the box next to it, and click 'OK'.

Disable the Missing Add-in from Excel Options
Accept Deletion Prompt: If Excel prompts you that the add-in cannot be found and asks if you want to delete it from the list, click 'Yes' to permanently resolve the error.
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Frequently Asked Questions

Why does Excel keep looking for a deleted file at startup?

Excel stores a list of active add-ins in its registry and settings. If you delete an add-in file directly from your computer's hard drive without first disabling it within the Excel Options menu, the program will still attempt to load it on startup, resulting in an error.

Can I just download the missing DLL file from a website?

It is highly recommended not to download individual DLL files from third-party sites, as they may contain malware or be incompatible with your system's architecture. Instead, reinstall the specific add-in or software that requires the DLL to restore it safely.

What is the difference between an .xla and an .xlam file?

Both are Excel Add-in files, but .xla is the legacy format used in Excel 97-2003, while .xlam is the newer, XML-based macro-enabled add-in format used in Excel 2007 and later versions.

How do I find out which add-in is causing the problem?

The startup error message usually displays the full file path. By checking the folder names within that path, you can typically identify the name of the software, company, or add-in responsible for the missing file.