If your login info was exposed, don't panic -- but don't ignore it either. Here's how to secure your accounts, change ...

Protect your data integrity by using Excel formulas to "lock" checkboxes so they only tick when specific conditions are met.

Stop painting cells and use conditional formatting to build accessible, formula-ready, and automated Excel spreadsheets.

There are several apps for Windows, but many come at a hefty price. If you need free options that can accomplish the same ...