I can't log in to my Windows device using Joval.

There are Several Possible Reasons

  1. You have provided an incorrect password.
  2. You are attempting to log in as a user who is not a member of the Administrators group. Only Administrators are able to login via WS-Management.
  3. The target machine is configured to disallow the “Negotiate” authenticate method.  To view permitted authentication methods on the target, run the command:
    winrm get winrm/config/Client/Auth
  4. In certain situations, when the target machine is joined to a domain, logging in using a local machine account is disabled.  This problem has been observed after upgrading from Windows Management Framework 1.0 to 2.0, for example, on a Windows 2008 Server machine (not R2). To enable local account logins in this situation, you must create the LocalAccountTokenFilterPolicy registry value:
    Key Path: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
    Value Name: LocalAccountTokenFilterPolicy
    Type: DWORD
    Value: 1
    

    For more information see KB951016.