Microsoft has released KB 3191855, a patch that’s designed to fix the bug in this month’s KB 3178690 security patch. You may recall that the March 14 security patch rendered Excel 2010 pretty much useless.
According to the KB article, this new patch does the following:
Fixes an issue that causes Excel 2010 to crash when spreadsheets are recalculated. This issue occurs after you install MS17-014: Description of the security update for Excel 2010: March 14, 2017 (KB3178690).
