A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
I did all things, and I reinstalled office but same isssue occure.
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After updating Windows on 9th September 2026, the paste function in Excel 2019 Standard is not working. The issue has occurred for three users, and all are experiencing the same problem. Kindly assist.
A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
I did all things, and I reinstalled office but same isssue occure.
Hello @Vibilu Balan, @Dodo ,
A known issue has been confirmed by Microsoft in the September 2026 Excel security update. According to the published advisory, paste operations may fail silently in Excel 2016, Excel 2019, Excel 2021, and Excel 2024, which matches the behavior you described where copy appears to succeed but paste does not complete. Microsoft is currently investigating the issue.
As this is a known issue associated with the update, it appears to be related to the Windows/Office update interaction rather than a problem with your Office installation itself.
At this time, the available workaround is to roll back to a Windows version prior to the update where the issue was introduced, if this is permitted within your environment, and monitor Microsoft's advisory for further updates and a permanent fix.
For detailed instruction, please check: Go back to the previous version of Windows | Microsoft Support
Alternatively, I recommend waiting for upcoming Microsoft updates, as Microsoft is actively investigating the issue and may provide a fix in a future update.
I hope this information helps.
Hello @Vibilu Balan,
As you mentioned that you have already tried everything, may I confirm whether you have gone through all the troubleshooting steps provided in the AI response, including testing Excel in Safe Mode, disabling add-ins, clearing the clipboard, and checking for conflicts with other applications?
I would also suggest performing an Office Repair if you have not already done so:
If all of those steps have been completed and the issue still persists, and since the problem started immediately after the Windows update and is affecting multiple users, I would recommend testing a rollback to the previous Windows version on one affected device to determine whether the recent update is the root cause.
For detailed instruction, please check: Go back to the previous version of Windows | Microsoft Support
Please note that Office 2019 reached end of support on October 14, 2025. While the application may continue to work, Microsoft no longer provides bug fixes, security updates, or technical support for this version. As a result, compatibility issues that arise following newer Windows updates may not receive a dedicated product fix. I would recommend planning an upgrade to a supported Office version to ensure continued compatibility and support.
I hope this information helps.
Best Regards,
AI answer
Use this troubleshooting path in order for the affected Excel 2019 devices:
If all three users were updated on the same date and the issue appeared at the same time, the most likely paths are: