When you open macro-enabled workbooks, which are Excel files with an XLSM extension, Microsoft Office alerts you with a security warning.

Excel failed to warn the user before running any macro contained in a file in the SYLK file format, an almost-forgotten file type but one with which Microsoft Office had maintained compatibility.

Taking XLSM File Precautions Before trying to open an XLSM file, Kaspersky warns that some macros in these files can be malicious, especially if you receive your spreadsheet through a random email.

How to Open Excel With Macros Disabled. When used in Microsoft Excel 2010, macros are simply pieces of computer code that get loaded when you launch the software. Normally, macros help you perform ...

Note: This book review was conducted as an audio interview of macros expert John Dukovich, by Phil Shapiro, using Audacity, the free sound recording and editing software. The review is available ...