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This matches a known Excel issue caused by a recent update, where drag-to-fill, drag-and-drop copy, and paste can fail even when Enable fill handle and cell drag-and-drop is already turned on.
Supported checks and actions:
- Confirm the fill handle setting is enabled:
- File > Options > Advanced
- Under Editing options, make sure Enable fill handle and cell drag-and-drop is selected.
- Try the non-drag fill method:
- Select the cell with the formula or content.
- Select the adjacent cells to fill.
- Go to Home > Fill > Down, Right, Up, or Left.
- Keyboard shortcuts: Ctrl+D to fill down, Ctrl+R to fill right.
- If drag/copy/paste still does nothing across all workbooks, treat it as the known update-related issue.
- A Microsoft Q&A accepted answer identifies this as a known issue due to a recent update and points to the Excel hotfix article for KB5002914.
- Temporary workaround:
- Use Home > Fill > Series or the Fill command instead of dragging until the fix is applied.
- If copy/paste is also failing:
- One reported workaround is Ctrl+X, then Ctrl+Z, then Ctrl+V.
If the problem started suddenly and affects every workbook, that pattern is consistent with the known update issue rather than a workbook setting.
References: