A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
Hi @Maureen Hanson,
To better understand the issue, could you please provide the following information?
- Which version of Excel are you using? (For example, Microsoft 365 Apps, Excel 2021, Excel 2019, Excel 2016, etc.)
- Is this a Microsoft 365 Click-to-Run installation, or a perpetual version such as Excel 2016/2019 installed from MSI media?
- What is your Excel version and build number? (Excel > File > Account > About Excel)
- Did the issue begin after a recent Office or Windows update?
- Does the problem occur in all workbooks, including a brand-new blank workbook?
- When you copy content, do you see the moving dashed border ("marching ants") around the selection?
- Does the issue occur only with standard Paste (Ctrl+V), or do all paste methods fail?
The reason I ask is that Microsoft has documented a known issue in KB5002914 for Excel 2016 where paste operations can fail silently. Microsoft subsequently released KB5002665 to address that issue. However, this would apply specifically to affected Excel 2016 installations, so I'd like to confirm your version before focusing on that possibility.
For your reference:
- Description of the security update for Excel 2016: September 08, 2026 (KB5002914) | Microsoft Support
- September 16, 2026, update for Excel 2016 (KB5002665) | Microsoft Support
Once you provide the version and build details, I can help determine whether you're seeing the documented update-related issue or a different cause.
Looking forward to your response so we can get this sorted out for you together.