A system shutdown is in progress.(1115)

You used shutdown -m \\%1 -r -t 0 -f to restart remote machine and receive:

To ensure the computer are not restarted use psexec \\%1 net statistics server to look for boot time:

If computer is not restarted try to kill winlogon service with pskill \\%1 winlogon:

If no success then determine which process takes memory with psexec \\%1 tasklist:

kill the process for example with pskill \\%1 TrustedInstaller

Once you kill the right process the computer will go in reboot instantly cause you launch the shutdown command like hour ago.

In all examples replace %1 with your remote computer name.