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One can open the command line (cmd) and type

shutdown -s -t 1200 

to shut down Windows 8 in 1200 seconds. However, an ugly banner appears over the whole screen 10 minutes before the shutdown! Is there a way to avoid the banner showing up?

enter image description here

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1  
I see no banner when I do this (except the notification in the tray(. Can you take a screen shot? – cutrightjm Oct 18 '12 at 5:38
    
imgur.com/AKSMN – MarkovCh1 Oct 19 '12 at 5:55

In PowerShell, use:

timeout -t 1800; shutdown -s

Or in cmd, use:

timeout 1800 && shutdown -s

They will cause a delay of 1,800 seconds (30 minutes), then perform the shutdown.

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Thanks for the edit! – MarkovCh1 Oct 19 '12 at 15:44
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You'll want to use && rather than &. && only executes the right hand side if the left hand side returns an errorlevel of 0 (i.e. successful execution). & will always execute the right hand side. The problem here is that & will execute the right hand side even if you cancel the countdown (with Ctrl + C), which is dangerous. – Bob Oct 27 '12 at 14:10
    
Thank you! I'll edit his edit :) – MarkovCh1 Oct 27 '12 at 23:46

You're looking for a "wait" command to add before shutting down, instead of making shutdown do the waiting. According to this question, this should do the trick:

ping -n 1201 127.0.0.1 > nul && shutdown -s

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This doesn't work as written. However, I figured out how to do it anyway. Good idea, I can't believe it hasn't occurred to me that there is a wait command on Windows (I'm used to Linux's shell, and made the bad assumption that Windows can't do anything). – MarkovCh1 Oct 19 '12 at 5:58
    
If you could let me know what the correct syntax is it would be helpful for people who find this question. – zmode Oct 19 '12 at 11:12
    
I'm not sure. Probably ping -n 1201 127.0.0.1 > nul; shutdown -s But I added an alternative answer below. You can test by using shutdown -s -t 10 in the command, and then immediately typing shutdown -a to abort the shutdown. EDIT: This might have failed for me because I used PowerShell! – MarkovCh1 Oct 19 '12 at 15:43
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FYI you don't need to use ping anymore to delay scripts/commands. Windows Vista and later have a built-in timeout command which achieves the same purpose in a less roundabout way. – nhinkle Oct 19 '12 at 19:14

There is a good utility in Sysinternals (now Microsoft) PSTools called psshutdown. I use it since Windows NT for remote shutdown. It can also do a local shutdown. To be honest, I didn't check the differences between psshutdown and shutdown. I think it's worth a try.

As per the delay, why not use the builtin scheduler? I am not familliar with powershell, but I believe that a script could be written that would get current date, time, add a desired interval ant then create a run once scheduled task to execute a shutdown.

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