--- updatedAt: 2025-08-14T13:33:26.000Z agentTools: siteIndex: https://developer.n-able.com/llms.txt projectIndex: https://developer.n-able.com/n-central/llms.txt --- # Windows Stability monitoring ```powershell PowerShell ##################################################################################### # Script: WindowsStabilityIndex # Description: Finds the most recent Windows Stability Index reading and places it # in the root\cimv2\Ncentral WMI namespace. This script is meant to be # used in conjunction with the Windows Stability Index custom service. # Author: Chris Reid # Date: Feb 10th, 2012 # Version: 1.0 ##################################################################################### # Version History # 1.0 - Initial Release (Feb. 10th, 2012) # Declare a few variables that we'll use later on in the script $Namespace = "NCentral" $Class = "WindowsStabilityIndex" #Grab the most recent Stability Index reading from the Win32_ReliabilityStabilityMetrics WMI class. The Format-Table command hides the table headers - all this script needs is the value, not any of the surrounding text $StabilityIndex = Get-Wmiobject Win32_ReliabilityStabilityMetrics -property @("SystemStabilityIndex") | Select-Object -first 1 {$_.SystemStabilityIndex} | Format-Table -HideTableHeaders | Out-String # The first command gave an output that is a string value; we need to convert this to a decimal value before we drop it into WMI. $StabilityIndex = [System.Convert]::ToDecimal($StabilityIndex) write-host "The Stability Index is: " $StabilityIndex # Check to see if the root\cimv2\Ncentral WMI namespace exists - if it doesn't, then let's create it # Thanks to http://gallery.technet.microsoft.com/scriptcenter/d230c216-9d21-4130-a190-4049ca2df21c for the code If (Get-WmiObject -Namespace "root\cimv2" -Class "__NAMESPACE" | Where-Object {$_.Name -eq $Namespace}) { WRITE-HOST "The root\cimv2\Ncentral WMI namespace exists." } Else { WRITE-HOST "The root\cimv2\Ncentral WMI namespace does not exist." $wmi= [wmiclass]"root\cimv2:__Namespace" $newNamespace = $wmi.createInstance() $newNamespace.name = $Namespace $newNamespace.put() } # Check to see if the 'WindowsStabilityIndex' class exists - if it doesn't, then let's create it If (Get-WmiObject -List -Namespace "root\cimv2\Ncentral" | Where-Object {$_.Name -eq $Class}) { WRITE-HOST "The " $Class " WMI class exists." # Because the class already exists, we need to make sure it's 'blank', and does not contain any pre-populated instances # Hint: Pre-populated instances could have come from someone having already run this script. $GetExistingInstances = Get-WmiObject -Namespace "root\cimv2\Ncentral" -Class $Class WRITE-HOST $GetExistingInstances If ($GetExistingInstances -eq $Null) { WRITE-HOST "There are no instances in this WMI class." } Else { WRITE-HOST "There are pre-existing instances of this WMI class - deleting." ForEach ($Instance in $GetExistingInstances) {Remove-WMIObject -Namespace "root\cimv2\Ncentral" -Class $Class} } } WRITE-HOST "The " $Class " WMI class does need to be created." # Because the class doesn't exist (or has just been deleted), let's create it, and specify all of the appropriate properties. $subClass = New-Object System.Management.ManagementClass ("root\cimv2\Ncentral", [String]::Empty, $null); $subClass["__CLASS"] = $Class; $subClass.Qualifiers.Add("Static", $true) $subClass.Properties.Add("Name", [System.Management.CimType]::String, $false) $subClass.Properties["Name"].Qualifiers.Add("Key", $true) $subClass.Properties.Add("StabilityIndex", [System.Management.CimType]::Real64, $false) $subClass.Put() # Now let's push the backup data into WMI $PushDataToWMI = ([wmiclass]"root\cimv2\Ncentral:WindowsStabilityIndex").CreateInstance() $PushDataToWMI.Name = "Stability Data" $PushDataToWMI.StabilityIndex = $StabilityIndex $PushDataToWMI.Put() ``` ```powershell Service Template This script monitors the 'Stability Index' of a Windows operating system. This custom service must be used in conjunction with the 'Windows Stability Index' PowerShell script. Windows Stability Windows Stability Custom WMI Service Custom WMI Service Scan Interval Scan Interval The number of minutes between scans. Matrix Size The number of matrices. The number of matrices. Namespace WMI class namespace used for this scan detail. WMI class namespace used for this scan detail. Implementation Method WMI implementation method used for this scan detail. WMI implementation method used for this scan detail. Class Name WMI class name used for this scan detail. WMI class name used for this scan detail. Processing Type Processing type used for this scan detail. Processing type used for this scan detail. Number of Constraints The number of constraints for this scan detail. The number of constraints for this scan detail. Constraint 0 The constraint parameter for this scan detail. The constraint parameter for this scan detail. WMI property The name of the variable used for this scan detail. Enter the WMI property to be used by this service. Padding Type Padding type used to construct WQL query. Padding type used to construct WQL query. Number of Variables The number of variables for this scan detail. The number of variables for this scan detail. Property 0 The WMI property used for this scan detail. The WMI property used for this scan detail. Variable 0 Name The name of the variable used for this scan detail. The name of the variable used for this scan detail. Scan detail name Scan detail name Scan detail name Scan detail recipe Scan detail recipe Scan detail recipe Scan detail type Scan detail type Scan detail type 2416801 Stability Index Help Popup Help WMI24168_1 ``` ```json Response Example {"success":true} ``` # Windows Stability monitoring There are a few steps involved in getting this service to work: 1. Upload the custom service to your N-central server (instructions on how to do this are included in this Zip file) 2. Run the included PowerShell (*.ps1) script on the appropriate Windows devices (Recommend doing this through a Scheduled Task Profile in N-central) 3. Adding the custom service to the appropriate devices in N-central (Recommend putting the custom service into a Service Template, and then associating both the Service Template and the Scheduled Task Profile with a Rule)