Use your mobile device to unlock or edit a file that another user has locked for editing.

You cannot open a workbook or document that has been password protected in the Windows-based version of Excel or Word if the password is longer than fifteen characters. If you want to …

To enable some cell editing, while leaving other cells locked, it's possible to unlock all the cells. You can lock only specific cells and ranges before you protect the worksheet and, optionally, …

Find out how you can unlock an Excel spreadsheet when you are locked out of an Excel file by yourself or by another user.

Removing a password from a document is a simple process, but you have to know the original password. Open the document and enter its password. Go to File > Info > Protect Document > …

Use Restrict Editing to protect parts that can or can't be changed, who can make changes, find areas you can edit, or unlock a protected document.

After you import an AutoCAD drawing and accept the default settings, the AutoCAD file will be locked on the page. This is to protect it from being moved, resized, and deleted.

On the File menu, click Exit Task Manager. Start Windows Explorer, and then browse to the folder that contains the document file that you tried to open when you received the error message.

You can lock a file to make it read-only and prevent it from being accidentally deleted. Lock or unlock a workbook to make it read-only Note: If your workbook is shared, anyone who has …

A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This key, which is a 48-digit number, is used to regain access to the drive.