A question that sounds like: How to remove protection from a sheet of an Excel file? The solution is simple – but what if you were looking for it? 😉

To begin with, let’s clarify for ourselves that the xlsx file is a .zip archive, inside which content, styles and other settings are stored. Including passwords, attendance, address – though in encrypted form.
To begin with, let’s open this very archive in any convenient way: for example, with the 7zip program, Winrar – it doesn’t matter.

Find the file\xl\worksheets\sheetxxx.xml inside. (xxx is the number of the required page).
Open it for editing, find the tag and delete it. We save the .xml file inside the archive.
Everything. The sheet is now fully editable 🙂

Video in a more visual form:

Need to reset your password? remember the previously deleted tag and insert it back.

Thanks 🙂