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Macro Security

Macros can save time and energy, but an ill-conceived macro can (intentionally or unintentionally) destroy data and otherwise wreak havoc on your system or network. For example, a macro that automates file management tasks by deleting old files could inadvertently wipe out a whole folder full of files if you don't define its parameters carefully.

You can have a high degree of confidence in macros you write yourself, but you should never trust a macro you receive from someone you've never met. Although VBA macro viruses are no longer a critical security concern, thousands of macro viruses still exist, and new varieties still appear with depressing regularity. You run the risk of encountering a nasty bit of malware every time you open a document, workbook, presentation, or Access database.


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