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The Simplest Ways to Open, Edit, and Convert XLSX Files

You don't necessarily need Microsoft Excel to work with an .xlsx file Reviewed by Ryan Perian This article explains what XLSX ...
Computerworld

Excel refusing to open files? Blame the KB 3115322, 3115262 security updates

This month's monster security patch for Office breaks Excel when it tries to open HTML files, and it seems unlikely Microsoft will fix the problem Excel users are reporting an odd bug in the way Excel ...