Microsoft Excel Security Update Causes Silent Copy-and-Paste Failures

Microsoft released an Excel update to fix security problems.

However, the update can make copying and pasting stop working.

A person may copy information and paste it, but nothing appears in the new location.

Excel may not show an error or warning.

Some users also say autofill and formula-dragging do not work correctly.

Uninstalling the update may make Excel work normally again.

But doing that also removes important security protections.

Microsoft is investigating the problem and has not yet announced a permanent fix.

Users and administrators must decide whether the spreadsheet problem or the security risk is more urgent.