My desktop, every day shut down in same time. (1:26 pm)
I saw running task, in Task Scheduler and found two task.
Do this tasks turn off my system?
MsCtfMonitor - This scheduled task runs when you log on to a user account. This scheduled task monitors the TextServicesFramework system service.
from KB939039 (also applies to Win 7, as well as Vista)
check the event viewer to see if there is something listed there that happens at 1:26