On 8, Microsoft rolled out KB5002914 for Excel, but it apparently has a bug that makes it impossible to copy and paste.
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Stop using so many tabs in Microsoft Excel
Fragmenting your data across many Excel tabs is a common habit that silently kills file performance, introduces hidden errors, and turns reporting into a tedious chore. Here's why you need to stop.
Microsoft's September security update stops Excel from pasting. The command fails without a beep and without an error message ...
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