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PC Shutting Down

Have a staff member whose PC keeps shutting down at 5pm or so they say !!!

It doesn't happen to any other PCs which are the same and for other staff. I can't find anything in Group Policy or on the PC such as scripts or within the local policy that seems to be doing this. I have changed the windows updates settings so maybe this may help but I doubt it.

Just wondered if anyone had any other ideas or anything I may have missed or confirm where to look in policies !!!
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IT Consultant
Commented:
local scheduled task?
malware?
something in windows logs?
difference when PC connected to LAN/internet and offline?
Peter HutchisonSenior Network Systems Specialist

Commented:
Check Anti-virus settings where you can sometimes tell computer to do a scan and then shutdown the computer when it is complete.

Commented:
type "at" on the command line an see if anything pops up.
you can check event viewer in applications log and it should say what is turning the machine off.
Run the following commands from cmd.
1) at > %userprofile%\desktop\tasks.txt
2) gpresult /h %userprofile%\desktop\gpreport.html

Review the two files created on the desktop.
Commented:
There is most likely a windows task schedule setup to shut down the PC.

open task scheduler:

Method 1:

1. Click the Start button.
2. Click Control Panel .
3. Click System and Maintenance .
4. Click Administrative Tools
5. Double-click Task Scheduler .

Method 2:

1. Open a command prompt. To open a command prompt, click Start , click All Programs , click Accessories , and then click Command Prompt .
2. At the command prompt, type Taskschd.msc .