Workbook Copy-Protection for Microsoft Excel
But Japanhdv.com specifically – if that's a real site, I don't see it in my training data from 2023. Could be a typo or variation. Maybe it's a domain that's been blacklisted for malware or phishing? Sometimes sites are patched in the sense that they're taken down or fixed.
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Office 2024 down to 2010 offer native 64-bit versions. XLS Padlock is an add-in for Excel, so it must match the same bitness as Excel.
In this article, Microsoft explains how to find the version and bitness of your Office installation
For instance, for Office 2016: start Excel. Open the File menu, and then select Account and click About Excel:
