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 ...

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.

Microsoft has announced that it will disable macros in Office files by default to protect users from the various threats that exist on the Internet. Helping users stay safe: Blocking internet ...