Since i started with some Windows 8 clients, i have a very strange problem... the ones that are always powered on are shuting down every Monday at 1 AM.
To resolve this, i tried a lot of configurations with no luck. Some of the configurations and caracteristics of the problem are this:
First of all i checked if there was a programed task that shutdown or restart my computer, but there are no tasks configured to do it.
The automatic updates are programed to be executed at 3 AM, so, they are not the ones that shudown the PCs, and also they are programed to RESTART the computers, not to shutdown them.
In some tutorials, people said that the process that was causing the problem was the Windows 8 Hybrid Shutdown, that makes some kind of Hibernation to Power On in less time, so i disabled it, but computers are still shuting down.
I created a new Group Policy to reconfigure the automatic updates to be programed at another hour and disable the "auto-install high priority updates" option and configure the option that prevents the PCs to restart when an automatic update is performed.
How i know they are shuting down at 1 AM? i checked the System Logs and exactly at 1 AM the user SYSTEM starts the shutdown.exe process for 32 bits, located in WINDOWS_FOLDER\System32
The only clue i have is that it might be an application the one that it's shuting down the computers, cause i configured a clean install of the same Windows 8 version in a new computer, joined it to the domain, applied the same Group Policies and that's the only computer that is not shuting down.
All the computers are running the same Windows 8 version: 64 bits Professional
It's hard to determine which application (in case it is some specific software) is the one that fires the shutdown, cause the 3 computers that are powering off use different softwares, the only common software might be Microsoft Office 2010, WinRAR, Cobian Backup 11, Spark Client and ESET Endpoint Antivirus
Any comments are welcomed, or if anyone has resolved a similar problem please help me.