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PieterEtzebeth1's avatar
PieterEtzebeth1
Copper Contributor
Mar 26, 2025

Excel error - "One or more add-ins failed to install custom functions

I need help.

I had to do a fresh start on my laptop. Since then, all the files that I used Power Query in have given me an error message at the bottom of the screen.

I have tried to remove all the add-ins and restart them, but nothing that I tried worked.

 

 

excel
office 365

1 Reply

  • Kidd_Ip's avatar
    Kidd_Ip
    MVP
    Mar 27, 2025

    Worth taking a look at below:

     

    1. Check Disabled Add-ins:

    • Go to File > Options > Add-ins.
    • At the bottom, select Disabled Items from the dropdown and click Go.
    • If any add-ins are listed, enable them and restart Excel.

    2. Repair Office Installation:

    • Open Control Panel > Programs > Programs and Features.
    • Select Microsoft Office and click Change.
    • Choose Quick Repair or Online Repair to fix any corrupted files.

    3. Reinstall Power Query Add-in:

    • If Power Query is a separate add-in, uninstall and reinstall it from the official Microsoft website.

    4. Clear Excel Cache:

    • Delete temporary files and cache that might be causing conflicts:

    5. Check for Conflicting Add-ins:

    • Disable all add-ins and enable them one by one to identify the problematic add-in.

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