Monthly Archive


Windows server 1709

Get Active Hours

Windows 10 and Server 2016 (and later) have the concept of active hours. These are the hours you define as working hours in effect. This is how you get active hours for a system

$sb = {

$ahs = Get-Item -Path HKLM:\SOFTWARE\Microsoft\WindowsUpdate\UX\Settings

$props = [ordered]@{
ComputerName = $computerName
ActiveHoursStart = $ahs.GetValue('ActiveHoursStart')
ActiveHoursEnd = $ahs.GetValue('ActiveHoursEnd')

New-Object -TypeName PSobject -Property $props


Get-ADComputer -Filter * -Properties OperatingSystem |
where OperatingSystem -like "*Server*" |
select -ExpandProperty Name |
foreach {

Invoke-Command -ComputerName $psitem -ScriptBlock $sb -ArgumentList $psitem -HideComputerName |
select -Property * -ExcludeProperty RunSpaceId


The script block reads the registry key that contains the active hours information and outputs and object that contains the computer name, and start and end (in 24 hour clock) of the active hours.


I’m getting the information for all servers in the domain – use the OperatingSystem property on the computer to deselect non-servers. use Invoke-Command to run the command against the remote computer – hide the automatic computer name and runspaceid properties.

Windows update module

A Windows Update module is available on Windows versions 1709 and later. This includes Windows 10 Fall Creators Update, Windows Server 1709 and Windows Insider previews (Server and Client) post the 1709 release.

The module supplies the following cmdlets


The module is a CDXML module based on the root/Microsoft/Windows/WindowsUpdate/MSFT_WUOperations CIM class I discussed in a recent post.

If you’re working with these newer versions of Windows this module makes patching a good bit simpler. It shouldn’t be that much effort to backport the module using the MSFT_WUOperationsSession CIM class available on Windows Server 2016

Cannot verify the file SHA256 when installing package

I’m doing some work requiring containers and decided to use Server 1709 as it has some significant changes when compared to Server 2016.

The documentation - - just gives options for Windows Server 2016 and Windows Server Insider Preview. As 1709 is the shipping version of the Insider Preview I decided that should work.


All went well until it was time to download and install the docker package

Install-Package -Name docker -ProviderName DockerMsftProviderInsider -RequiredVersion 17.06.0-ce -Verbose


I saw the index download

VERBOSE: Downloading

then hit a warning

WARNING: Cannot verify the file SHA256. Deleting the file.

The install then terminates with an object not found error

Install-Package : Cannot find path
'C:\Users\Richard\AppData\Local\Temp\2\DockerMsftProviderInsider\' because it does not exist.


I tried to use Save-Package but got a similar error. This seems to a be a common issue from the thread here -


I modified the work around from that thread

First: Download the index file

PS>  Start-BitsTransfer -Source -Destination c:\source


Convert to PowerShell object

$dv = Get-Content -Path  c:\source\DockerMsftIndex.json | ConvertFrom-Json


You can see the versions available



And extract a single version

PS>  $dv.versions.'17.06.0-ce'

date   : 2017-07-10T16:35:52
url    :
size   : 16277800
notes  : This is the latest CE version of docker
sha256 : 3D27360A11A3A627AAC9C6D73EB32D4A9B6DCCA6BCB4B2C7A5FCD9D2E0EC6C82


Now you can download the zip file

PS>  Start-BitsTransfer -Source "" -Destination C:\ source\


Unblock the file just in case

PS>  Unblock-File -Path C:\Source\


Check the file hash

PS>  $dv.versions.'17.06.0-ce'.sha256
PS>  Get-FileHash -Path C:\Source\ | Format-List

Algorithm : SHA256
Hash      : 3D27360A11A3A627AAC9C6D73EB32D4A9B6DCCA6BCB4B2C7A5FCD9D2E0EC6C82
Path      : C:\Source\

They look to be the same but to save wear and tear on my eyeballs

PS>  $dv.versions.'17.06.0-ce'.sha256 -eq (Get-FileHash -Path C:\Source\


Now copy to the folder Install-Package was trying to use.

PS>  Copy-Item -Path C:\source\ -Destination C:\Users\Richard\AppData\Local\Temp\2\DockerMsftprovider\ -Force


Notice the 2 in the path. Not sure why that’s there but seems to be necessary.

Move into the folder

PS>  Push-Location -Path C:\Users\Richard\AppData\Local\Temp\2\DockerMsftProvider\


The instructions say to rename the zip file but use copy-item instead of rename-item. Its because Install-package will delete the zip file when its completed. This way you have the original available if you need it.


You can now install the package.

Install-Package -Name docker -ProviderName DockerMsftProviderInsider -Verbose -RequiredVersion 17.06.0-ce


Because the download file exists the save is skipped.  The hash verification works and docker is installed. The installation of docker also enables the containers feature.


Restart the VM to finish the installation and start the docker service.


This shouldn’t be necessary. Being able to download packages and install them should just work. There’s something wrong in the whole process which needs a MS fix.

Windows update change in Server 1709

When Windows Server 2016 was introduced a very nice CIM class was provided to work with Windows Updates. If you wanted to scan for available updates you could do something like this:

$ci = New-CimInstance -Namespace root/Microsoft/Windows/WindowsUpdate -ClassName MSFT_WUOperationsSession  <br>$result = $ci | Invoke-CimMethod -MethodName ScanForUpdates -Arguments @{SearchCriteria="IsInstalled=0";OnlineScan=$true} <br>$result.Updates


Unfortunately, if you try this on Windows Server 1709 you’ll get an error:

New-CimInstance : The WS-Management service cannot process the request. The class MSFT_WUOperationsSession does not exist in the root/microsoft/windows/windowsupdate namespace. 
 At C:\Program Files\WindowsPowerShell\Modules\WSUSupdates\WSUSupdates.psm1:14 char:9 
 +   $ci = New-CimInstance -Namespace root/Microsoft/Windows/WindowsUpda ... 
 +         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo          : ObjectNotFound: (MSFT_WUOperationsSession:CimInstance) [New-CimInstance], CimException 
    + FullyQualifiedErrorId : HRESULT 0x80338000,Microsoft.Management.Infrastructure.CimCmdlets.NewCimInstanceCommand 
    + PSComputerName        : w1709cn01


This change does NOT appear to have been documented.


What you will find is the MSFT_WUOperations CIM class which appears to be a very simplified version of MSFT_WUOperationsSession as it has just 2 static methods.

PS>  $class = Get-Cimclass -Namespace root/microsoft/windows/windowsupdate  -ClassName MSFT_WUOperations 
 PS>  $class.CimClassMethods

Name           ReturnType Parameters                              Qualifiers 
 ----           ---------- ----------                              ---------- 
ScanForUpdates     UInt32 {SearchCriteria, Updates}               {implemented, static} 
InstallUpdates     UInt32 {DownloadOnly, Updates, RebootRequired} {implemented, static}


To scan for available updates on Server 1709 you use it like this:

PS>  Invoke-CimMethod -Namespace root/microsoft/windows/windowsupdate  -ClassName MSFT_WUOperations -MethodName  ScanForUpdates -Arguments @{SearchCriteria="IsInstalled=0"} | select -ExpandProperty Updates

 Description    : A security issue has been identified in a Microsoft software product that could affect your system. 
                 You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. 
                  After you install this update, you may have to restart your system. 
KBArticleID    : 
MsrcSeverity   : Critical 
RevisionNumber : 201 
 Title          : Cumulative Update for Windows Server 2016 (1709) for x64-based Systems (KB4043961) 
UpdateID       : 0d02abc5-41ec-4768-8419-8487fa2e322b 
PSComputerName :


To install updates on Server 2016 you’d do something like this

$ci = New-CimInstance -Namespace root/Microsoft/Windows/WindowsUpdate -ClassName MSFT_WUOperationsSession 
Invoke-CimMethod -InputObject $ci -MethodName ApplyApplicableUpdates


The equivalent for Server 1709 is

PS>  $au = Invoke-CimMethod -Namespace root/microsoft/windows/windowsupdate  -ClassName MSFT_WUOperations -MethodName  ScanForUpdates -Arguments @{SearchCriteria="IsInstalled=0"}

PS>  Invoke-CimMethod -Namespace root/microsoft/windows/windowsupdate  -ClassName MSFT_WUOperations -MethodName  InstallUpdates -Arguments @{Updates = $au.Updates}

RebootRequired ReturnValue PSComputerName 
 -------------- ----------- -------------- 
          True           0


in this case a reboot is required which can be managed with Restart-Computer