Configuring the Windows Update Agent - Overview

Configuring the Windows Update Agent - General Settings Part 1

Configuring the Windows Update Agent - General Settings Part 2

Configuring the Windows Update Agent - WSUS Settings

 

7. WUA Policies related to scheduled installations only

A number of settings are related explicitly, and exclusively, to scheduled installations. For these settings, a scheduled installation is an installation initiated by the WUAgent when AUOption=’4’ at the ScheduledInstallationDay and ScheduledInstallationTime specified in the settings. Any other installation is considered an unscheduled installation and these settings are not relevant.

 

Delay Restart for Scheduled Installations

This setting allows the configuration of how long the WUAgent waits after the completion of the installation event before launching the restart sequence. Generally this option would only have significance when installations are scheduled to occur during the workday and the user may be impacted. The default value is 5 minutes. It can be set from 1 to 30 minutes.

 

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU

Registry Value

Valid Decimal Values

Valid Hex Values

Notes

RebootWarningTimeoutEnabled

0-1

0x0–0x1

If enabled, uses the delay specified in the RebootWarningTimeout value

RebootWarningTimeout

1-30

0x1–0x1e

 

Delay Restart for Scheduled Installations - Registry.pngDelay Restart for Scheduled Installations - Policy.png

 

No Auto-Restart with Logged On Users for Scheduled Automatic Updates Installations

When a scheduled installation occurs with a logged on non-administrative user on Windows XP (or Windows Server 2003), that user will be forced to restart the system. This setting allows the non-administrative user to interactively launch the installation, rather than it occurring automatically. It does not grant the non-administrative user the ability to defer or cancel the restart. Admin users always have the option to initiate or defer the restart. Generally this option would only be used for scheduled installation events that occur during the workday. Enabling this option with overnight scheduled installations can interfere with the expected system restart if a user failed to log off of the system at the end of the workday. All users on Vista and newer systems are prompted with a dialog to control when the restart occurs, unless the setting to block this functionality has been enabled. On Vista and newer systems, the user is given three choices when deferring the restart: 10 minutes, 1 hour, or 4 hours. This setting has no functional significance on Vista and newer systems.

 

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU

Registry Value

Valid Decimal Values

Valid Hex Values

Notes

NoAutoRebootWithLoggedOnUsers

0-1

0x0–0x1

If enabled, allows a non-admin user to initiate the restart, rather than having it forced by the WUAgent

No Auto-Restart with Logged On User - Registry.pngNo Auto-Restart with Logged On User - Policy.png

Re-prompt for Restart with Scheduled Installations

When a user on Windows XP/2003 is presented the option to “Reboot Later,” the duration of the delay before the user is prompted again is determined by this setting. The default delay is 10 minutes. The delay can be configured from 1 to 1440 minutes (24 hours). On Vista and newer systems, the delay is selected by the user from one of three choices: 10 minutes, 1 hour, or 4 hours.

 

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU

Registry Value

Valid Decimal Values

Valid Hex Values

Notes

RebootRelaunchTimeoutEnabled

0-1

0x0 – 0x1

If enabled, allows the configuration of the time delay before the restart dialog is presented to the user

RebootRelaunchTimeout

1-1440

0x1 – 0x5a0

 

Re-prompt for Restart With Scheduled Installation - Registry.pngRe-prompt for Restart With Scheduled Installation - Policy.png

 

Reschedule Automatic Updates scheduled installations

This setting determines whether updates are installed at system startup when the scheduled installation event is missed and how long the delay after startup is before installation begins. The default behavior is to install updates 1 minute after startup (as a matter of practicality, this is 1 minute after the Windows Updates service startup). The installation at startup can be disabled, or it can be configured to occur from 1 to 60 minutes after startup.

 

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU

Registry Value

Valid Decimal Values

Valid Hex Values

Notes

RescheduleWaitTimeEnabled

0-1

0x0 – 0x1

If enabled, allows the configuration of the time delay after restart; If disabled, installation at startup will not occur

RescheduleWaitTime

1-60

0x1 – 0x3c

 

Reschedule Automatic Updates Scheduled Installations - Registry.pngReschedule Automatic Updates Scheduled Installations - Policy.png

 

Enable Windows Update Power Management to automatically wake up the system to install scheduled updates

For systems that are in sleep or hibernation mode, this setting allows the system to wake up at the scheduled installation event to install updates. If deadlines are configured, and expire, the system will wake up when the deadline expires. If the system is running on battery power, it will be returned to hibernation.

 

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU

Registry Value

Valid Decimal Values

Valid Hex Values

Notes

AUPowerManagement

0-1

0x0 – 0x1

If enabled, allows the system to wake up to install updates.

Enable Windows Update Power Management - Registry.pngEnable Windows Update Power Management - Policy.png