Echale un vistazo a este script Python que encotre entre mis cachibaches ;)

#!/usr/bin/env python
# win32shutdown.py

import win32api
import win32con
import win32netcon
import win32security
import win32wnet

def shutdown(host=None, user=None, passwrd=None, msg=None, timeout=0, force=1,
reboot=0):
""" Shuts down a remote computer, requires NT-BASED OS. """

# Create an initial connection if a username & password is given.
connected = 0
if user and passwrd:
try:
win32wnet.WNetAddConnection2(win32netcon.RESOURCETYPE_ANY, None,
''.join([r'\\', host]), None, user,
passwrd)
# Don't fail on error, it might just work without the connection.
except:
pass
else:
connected = 1
# We need the remote shutdown or shutdown privileges.
p1 = win32security.LookupPrivilegeValue(host, win32con.SE_SHUTDOWN_NAME)
p2 = win32security.LookupPrivilegeValue(host,
win32con.SE_REMOTE_SHUTDOWN_NAME)
newstate = [(p1, win32con.SE_PRIVILEGE_ENABLED),
(p2, win32con.SE_PRIVILEGE_ENABLED)]
# Grab the token and adjust its privileges.
htoken = win32security.OpenProcessToken(win32api.GetCurrentProcess(),
win32con.TOKEN_ALL_ACCESS)
win32security.AdjustTokenPrivileges(htoken, False, newstate)
win32api.InitiateSystemShutdown(host, msg, timeout, force, reboot)
# Release the previous connection.
if connected:
win32wnet.WNetCancelConnection2(''.join([r'\\', host]), 0, 0)

if __name__ == '__main__':
# Immediate shutdown.
shutdown('salespc1', 'admin', 'secret', None, 0)
# Delayed shutdown 30 secs.
shutdown('salespc1', 'admin', 'secret', 'Maintenance Shutdown', 30)
# Reboot
shutdown('salespc1', 'admin', 'secret', None, 0, reboot=1)
# Shutdown the local pc
shutdown(None, 'admin', 'secret', None, 0)