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Microsoft broke Ctrl+C and Ctrl+V in Excel

Summary by DEV Community
Somewhere inside the September 2026 Office updates, Microsoft shot itself in the foot again. Excel decided that copying and pasting cells was no longer part of its job :) The bug is simple. Press Ctrl+C. Select another cell. Press Ctrl+V. Nothing happens. The copied cells keep their moving border. The target cell stays empty. Excel shows no error and gives no warning. Very Windows: quiet, confident, and completely unhelpful. Microsoft has confir…
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Last week, Microsoft released the latest security updates for all supported products, as well as various components of Microsoft 365 in Office. Unfortunately, as usual, it wasn't without... Full version of the page: https://ithardware.pl/aktualnosci/aktualacja_zepsula_excel_kopiowanie_wklejanie-54015.html

A buggy security update from Microsoft is currently blocking basic functions in multiple Excel purchase versions. As copying and insertion completely fails, users must first uninstall the KB5002914 patch manually. (Continue reading)

A September security update breaks the copy-paste in Excel. Microsoft has recognized the bug and is still looking at how to fix it.

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DEV Community broke the news on Monday, September 14, 2026.
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