Few error messages are as frustrating as this one. You plug in an external drive, open an internal partition, or try to access an old user folder, and Windows slams the door in your face.
Below is a complete breakdown of why this happens and how to fix it. This error falls into three main categories: hard disk access denied
The good news: It almost always means Windows has lost permission to let your current account read the files. Few error messages are as frustrating as this one