With the Excel file open select File in the top-left corner of the screen, followed by Info. Select Protect Workbook, then choose Encrypt with Password.

When a worksheet is hidden using `xlSheetVeryHidden`, it cannot be made visible again through the Excel user interface, adding an additional layer of protection to your sensitive data.

Protecting a worksheet in Excel 2003 prevents others users from editing it. For example, if you have tracked and charted your business's sales on a sheet, you will want co-workers to access the ...

Crisis averted–kind of. Permission to copy the entire workbook is another problem. For instance, if you open a protected Excel file in the browser edition, you can see hidden formulas.

You can use Excel to control access to the PDF and prevent unwanted changes to your worksheet. You can also lock specified cells to protect the worksheet.

Microsoft Excel is immensely popular for both professional and personal spreadsheet needs. Here are the steps for unprotecting your worksheet.

I'm going to hazard a guess that it was being saved in compatibility mode in the original excel format. Somebody "updated" it, and the password protect would have died with it. You'll either need ...

Open the Excel Workbook and switch to the protected sheet. Go to the Review tab and head to the Protect section. Click on the Unprotect Sheet option. Enter the password and click the OK button.