Excel Copy/Paste Issue Fixer

Temporary recovery helper for the September 2026 Excel copy/paste regression.

Microsoft has acknowledged that Excel paste operations can fail silently after the September 2026 Office security updates. This project helps administrators move affected perpetual/volume Office installations back to a known-good build.

The script detects the installed Office family first. It stops rather than changing an unsupported product.

1. Close all Office applications.
2. Open PowerShell as Administrator.
3. Run:

powershell.exe -NoProfile -ExecutionPolicy Bypass -File '.\Excel-CopyPaste-Issue-Fixer.ps1'

The execution-policy bypass applies only to that PowerShell process.

4. Wait until the script finishes removing the buggy update or rolling Office back to the approved version.
5. Reboot your system.

• Test the result in Excel after a reboot: Ctrl+C/Ctrl+V, formula dragging, and AutoFill.
• Temporarily exclude the exact bad Office package in your patch-management product. Otherwise it can be installed again.
• A rollback can remove security fixes. Monitor the Microsoft KB and test a corrected update on a pilot device before removing the exclusion.
• This is an administrator convenience script, not an official Microsoft tool.

• Microsoft KB5002914 known issue
• Microsoft: revert to an earlier version of Office
• Microsoft Office security update release notes