Very often you can too belong to the same group of people who have lost their Excel document password. Most commonly, password protection is widely applied to Excel document and worksheets. Such as, Open password, worksheet password, workbook password, VBA code. How can I unlock it? So I am stuck, now what? Is there any reliable suggestion to this issue? One primary reason is that the author want to protect their proprietary code, internal information from unauthorized accessing or modifying.