Before you enable macros in your worksheets, you should understand how dangerous they can be.
Though VBA (Visual Basic for Applications) codes are extremely effective at automating complex and repetitive tasks, they pose a significant security risk. Unintentionally running a malicious macro can damage or completely delete files on your hard drive, corrupt your data, and even corrupt your Microsoft Office installation. As a result, the default setting in Excel is to disable all macros with notification.
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