On 8, Microsoft rolled out KB5002914 for Excel, but it apparently has a bug that makes it impossible to copy and paste.
Microsoft has fixed a known issue that causes copy-and-paste failures for Excel users after installing the September 2026 security updates.
Windows Report on MSN
Microsoft confirms Excel copy and paste isn’t working after KB5002914 update
Microsoft has confirmed a copy-and-paste issue affecting Excel 2024, 2021, 2019, and 2016 after the KB5002914 security update ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results