2555   Encryption key error on USB flash drive.

It is necessary to provide an encryption key before the system can become fully operational. This error can occur for one of the following reasons:

• The encryption key on the USB flash drive is corrupted.
• The expected encryption key cannot be found on the USB flash drive. This error can occur if a key for a different system or an old key for this system was provided. Additionally, other user-created files that match the key file name format can cause this error if the USB flash drive does not contain the expected key.
• An unsupported device is connected to a USB port. Only USB flash drives are supported.