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Does anyone know of a utility that will allow a user to postpone a reboot on their PC to safely save their work?

I came across something today called "Safe Reboot" and it displayed a message saying your IT Administrator would like to reboot your computer and it will count the time in seconds. The user had an option to extend the time by 3 minutes.

I am having trouble finding the name of the utility using Google.

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You can do this with SysInternal's psshutdown utility. See also:… – jscott Mar 1 '12 at 1:41
Why is there computer arbitrarily rebooting in the first place? – Zoredache Mar 1 '12 at 2:34
My guess would be do to patching. – aduljr Mar 1 '12 at 2:48
If this reboot is being triggered by updates, wouldn't it make more sense to use more appropriate update settings? – John Gardeniers Mar 1 '12 at 3:33

Open a command prompt (windows+R and enter "cmd" in the run box as an administrator or power user) and enter:

Shutdown -a

This will "abort" an automated or scheduled shutdown or reboot.

Below is the full syntax for the shutdown command:


shutdown [{-l|-s|-r|-a}] [-f] [-m [\ComputerName]] [-t xx] [-c "message"] [-d[u][p]:xx:yy]

Parameters -l : Logs off the current user, this is also the defualt. -m ComputerName takes precedence.

-s : Shuts down the local computer.

-r : Reboots after shutdown.

-a : Aborts shutdown. Ignores other parameters, except -l and ComputerName. You can only use -a during the time-out period.

-f : Forces running applications to close.

-m [\ComputerName] : Specifies the computer that you want to shut down.

-t xx : Sets the timer for system shutdown in xx seconds. The default is 20 seconds.

-c "message" : Specifies a message to be displayed in the Message area of the System Shutdown window. You can use a maximum of 127 characters. You must enclose the message in quotation marks.

-d [u][p]:xx:yy : Lists the reason code for the shutdown. The following table lists the different values.

Value Description u Indicates a user code. p Indicates a planned shutdown code. xx Specifies the major reason code (0-255). yy Specifies the minor reason code (0-65536). /? : Displays help at the command prompt.

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Hmm, not exactly user friendly, I don't know of many users who could manage this easily – Mark Henderson Mar 1 '12 at 2:59
Sorry, @Mark Still getting used to the mini-markdowns! The admin or user could Open Notepad and enter "shutdown -a" then Save-as filename "AbortShutdown.cmd" and choose file type "all files" from the dropdown. – G Koe Mar 1 '12 at 3:47

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