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Once you know who the culprit is, remove the extension permanently or remove and then add it. Now, remove these extensions one by one to find out which one is causing the issue. To know the culprit, open MS Excel (normally) and navigate to File > Options > Add-Ins > COM Add-ins.
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If Microsoft Excel is launching in safe mode without any issues, we can conclude that the problem is a result of an add-in.
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If you face the same issue proceed to the next step. After running Microsoft Excel in safe mode wait for a few seconds, and open Excel again.Type “Excel /safe” in Run and press Ctrl + Shift + Enter to run the command with admin access.To open a Run dialog box, Press the Windows + R.Use the prescribed solution to run Excel in safe mode. Opening MS Excel in Safe Mode will allow this app to open without any of them. If you find that Microsoft Excel is not working, it could be possible that some of the mods/add-ins/extensions are corrupted. Let’s resolve this issue by using the above methods.
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