Windows 11 中的 shutdown.exe 命令存在问题。
使用 PowerShell（以管理员身份运行）并运行 Set-ExcecutionPolicy
记事本、MMC、Resmon 全部完美执行，但无法关机，以下是结果的措辞。
PS C:\WINDOWS\system32> shutdown
Usage: C:\Windows\system32\shutdown.exe [/i | /l | /s | /sg | /r | /g | /a | /p | /h | /e | /o] [/hybrid] [/soft] [/fw] [/f]
[/m \\computer][/t xxx][/d [p|u:]xx:yy [/c "comment"]]
No args Display help. This is the same as typing /?.
/? Display help. This is the same as not typing any options.
/i Display the graphical user interface (GUI).
This must be the first option.
/l Log off. This cannot be used with /m or /d options.
/s Shutdown the computer.
/sg Shutdown the computer. On the next boot, if Automatic Restart Sign-On
is enabled, automatically sign in and lock last interactive user.
After sign in, restart any registered applications.
/r Full shutdown and restart the computer.
/g Full shutdown and restart the computer. After the system is rebooted,
if Automatic Restart Sign-On is enabled, automatically sign in and
lock last interactive user.
After sign in, restart any registered applications.
/a Abort a system shutdown.
This can only be used during the time-out period.
Combine with /fw to clear any pending boots to firmware.
/p Turn off the local computer with no time-out or warning.
Can be used with /d and /f options.
/h Hibernate the local computer.
Can be used with the /f option.
/hybrid Performs a shutdown of the computer and prepares it for fast startup.
Must be used with /s option.
/fw Combine with a shutdown option to cause the next boot to go to the
firmware user interface.
/e Document the reason for an unexpected shutdown of a computer.
/o Go to the advanced boot options menu and restart the computer.
Must be used with /r option.
/m \\computer Specify the target computer.
/t xxx Set the time-out period before shutdown to xxx seconds.
The valid range is 0-315360000 (10 years), with a default of 30.
If the timeout period is greater than 0, the /f parameter is
implied.
/c "comment" Comment on the reason for the restart or shutdown.
Maximum of 512 characters allowed.
/f Force running applications to close without forewarning users.
The /f parameter is implied when a value greater than 0 is
specified for the /t parameter.
/d [p|u:]xx:yy Provide the reason for the restart or shutdown.
p indicates that the restart or shutdown is planned.
u indicates that the reason is user defined.
If neither p nor u is specified the restart or shutdown is
unplanned.
xx is the major reason number (positive integer less than 256).
yy is the minor reason number (positive integer less than 65536).
Reasons on this computer:
(E = Expected U = Unexpected P = planned, C = customer defined)
Type Major Minor Title
U 0 0 Other (Unplanned)
U 0 5 Other Failure: System Unresponsive
U 5 15 System Failure: Stop error
U 5 19 Security issue (Unplanned)
U 6 11 Power Failure: Cord Unplugged
U 6 12 Power Failure: Environment
P 7 0 Legacy API shutdown
编辑：
自己解决了！多亏了您的评论和支持。
关机需要 /s (自行关闭)
需要说明的是，Shutdown /s 我尝试的是 Shutdown /s /t:120 - 我真傻。应该是 /t 120（没有冒号）我开始排除故障，将其简化为简单的“Shutdown”
答案1
关机需要参数。
帮助文本在参数解释的第一行中确实清楚地说明了：
无参数显示帮助。这与输入 /? 相同。
因此，您看到的是运行 Shutdown 而不使用任何命令的预期和正确结果。最简单的命令是shutdown /s关闭计算机的命令。
如果您希望使用此命令简单地关闭计算机，则必须使用适合您要求的参数。
答案2
看来 xx:yy 是强制性的。