Definition of a “Logical Failure”:

A logical failure is when your computer has become compromised by virus and spyware attacks, or user errors such as accidental deletion and formats, and also your operating system becoming corrupt through updates for security, etc.  This type of corruption normally attacks the computer’s ability to boot properly, thus denying access to your files. Logical failures are very common, and data can be retrieved in most cases; Of course this is dependent upon what has been done since the failure occurred.