@classmethod
def isValidSession(cls, session):
    """
        Class method to check the validity of a session.
        
        @param session dictionary containing the session data
        @type dict
        @return flag indicating validity
        @rtype bool
        """
    if not session:
        return False
    if 'Windows' not in session:
        return False
    if not session['Windows']:
        return False
    return True
