QuickBooks files might open as read-only if stored on a DVD or CD, in which case you can copy the file to your computer's hard drive before opening it. In addition, some files are read-only to protect from accidental edits, which you can resolve by running QuickBooks as an administrator. First, right-click the QuickBooks icon and select Properties > Compatibility > Run this program as an administrator, then attempt to open or restore the company file.