To monitor display and monitor details on Windows, you query the root\WMI namespace, which houses the core classes built to expose Extended Display Identification Data (EDID). The Core WMI Display Classes
Most display-specific classes inherit from the abstract MSMonitorClass. You can target three main classes using Windows Management Instrumentation (WMI): WMI Class Name Primary Use Case / Captured Details WmiMonitorID
Identity: Manufacturer ID, serial number, product code, and production year. WmiMonitorConnectionParams
Topology: Active connection type (e.g., HDMI, DisplayPort, DVI, VGA). WmiMonitorBasicDisplayParams
Capabilities: Maximum horizontal/vertical image size, aspect ratio, and gamma settings. Step-by-Step Monitoring Methods Method 1: PowerShell Scripting (Recommended)
PowerShell is the cleanest way to decode and read this data natively. Because strings like the UserFriendlyName or SerialNumberID are stored as arrays of ASCII byte integers, you need to cast them back into text. powershell
# Query and decode monitor information Get-CimInstance -Namespace “root\WMI” -ClassName WmiMonitorID | ForEach-Object { [PSCustomObject]@{ InstanceName = \(_.InstanceName Manufacturer = [System.Text.Encoding]::ASCII.GetString(\).ManufacturerName).Trim((Char)0) FriendlyName = [System.Text.Encoding]::ASCII.GetString($.UserFriendlyName).Trim((Char)0) SerialNumber = [System.Text.Encoding]::ASCII.GetString(\(_.SerialNumberID).Trim((Char)0) YearOfMfg = \)_.YearOfManufacture } } Use code with caution. Method 2: Testing via GUI (WBEMTest) If you want to manually verify the WMI provider: Press Win + R, type wbemtest, and hit Enter.
Click Connect, change the namespace path to root\WMI, and click Connect again. Click Query… and enter:SELECTFROM WmiMonitorID Double-click any returned instance to view its properties. Troubleshooting Common Issues
Access Denied / Remote Monitoring Failure: If querying displays across a network, ensure your monitoring account has explicit permissions. You can modify these settings by opening wmimgmt.msc, right-clicking WMI Control, selecting Properties, and adjusting the Security tab for the root\WMI namespace.
High CPU Utilization (WmiPrvSE.exe): Constantly polling monitor details via third-party tools can overload the WMI Provider Host. If your system lags, check Event Viewer under Applications and Services Logs > Microsoft > Windows > WMI-Activity > Operational to trace the Process ID (PID) of the app causing the loops.
Missing Data / Generic PnP Monitor: If a monitor displays blank or numeric values instead of a proper name, it means the monitor is using a generic Windows driver. Installing the manufacturer’s specific monitor driver (.inf file) will populate the EDID block correctly.
Are you setting this up for a local machine inventory, or are you trying to deploy a script across a remote corporate network? Let me know, and I can provide either an advanced batch deployment script or remote WMI configuration steps! WMI Provider Host: High CPU Causes, Fixes & Tips
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