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A Registry Key That Stops Windows Update From Rebooting Computer

Do you know how to prevent Windows Update from automatically rebooting computer or server?

Sometimes, Windows Update forcibly reboot computer in order to apply the patches (make them effective). This automatic system restart, however, is not always welcomed, especially when it affecting SLA. Imagine that Windows Update reboots a server before all system users agree to have downtime during an unforeseeable peak hours.

Don’t worry. There is a way to avoid Windows Update from rebooting your Windows machines until you give green light.
CAUTION: Leave now if you’re not comfortable to work with Windows Registry! Carelessness may corrupt the Windows Registry and cause system failure!

NOTE: I tested this trick on Windows 8.1. This Registry key, however, should work on any Microsoft operating systems that are NOT OLDER than Windows 2000 Service Pack 3.

Open an elevated Command Prompt window (run the cmd.exe as Administrator), then execute this command-line Registry tool (reg.exe) to configure a key that tells Windows Update not to reboot Windows when there is logged on user:
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoRebootWithLoggedOnUsers /t REG_DWORD /d 1 /f

Alternatively, download this Registry setting file (zipped) and double-click it to apply the setting:

NoAutoReboot.zip MD5 checksum:

NoAutoReboot.reg MD5 checksum:

Configure Windows Update not to automatically reboot Windows computer.

Once that Registry value is set to 1, your computer will not automatically restart in 1 day if you don’t restart it now, as long as there is a logged on user!

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