Online resources are not present for above queries. I want solution for both admin/non-admin user account. Please help to provide me the solution.

Hi, @ Vishal2 Bansal . Welcome to Microsoft Q&A. You could get all the devices of your current computer through the following code. string query = "SELECT * FROM Win32_PnPEntity"; ManagementObjectSearcher searcher = new ManagementObjectSearcher(query); foreach (ManagementObject device in searcher.Get()) { Console.WriteLine($"Name: {device["Name"]}" + "\n"); } These devices correspond to the devices in Device Manager ( Control Panel -> View by Select Large icons or Small icons -> Device Manager ).The order may not be consistent. Of course, you could also replace Win32_PnPEntity with Win32_VideoController or Win32_USBController for more precise designation. Find the device you want to shut down and start shutting down the device by calling ManagementObject.InvokeMethod . Start the device device.InvokeMethod("Enable", null); Turn off the device device.InvokeMethod("Disable", null); After execution, you could observe that the status of the device has changed. If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

I want to disable/enable usb and HDMI port whenever my c# wpf (.net Framework 4.7.2) app runs.

Accepted answer

Hongrui Yu-MSFT 4,200 Reputation points Microsoft Vendor

2025-01-16T03:34:26.5233333+00:00
Hi, @Vishal2 Bansal. Welcome to Microsoft Q&A.

You could get all the devices of your current computer through the following code.

string query = "SELECT * FROM Win32_PnPEntity"; ManagementObjectSearcher searcher = new ManagementObjectSearcher(query); foreach (ManagementObject device in searcher.Get()) { Console.WriteLine($"Name: {device["Name"]}" + "\n"); }

These devices correspond to the devices in Device Manager(Control Panel->View by Select Large icons or Small icons->Device Manager).The order may not be consistent.

Of course, you could also replace Win32_PnPEntity with Win32_VideoController or Win32_USBController for more precise designation.

Find the device you want to shut down and start shutting down the device by calling ManagementObject.InvokeMethod.

Start the device

device.InvokeMethod("Enable", null);

Turn off the device

device.InvokeMethod("Disable", null);

After execution, you could observe that the status of the device has changed.

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
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Vishal2 Bansal 225 Reputation points

2025-01-16T06:50:19.49+00:00

This method is not working. Invoke Method is not present for Win32_PnPEntity.

Also my device doesn't have admin priviledge. So is is this also hinder the execution?

Hongrui Yu-MSFT 4,200 Reputation points Microsoft Vendor

2025-01-16T08:45:38.85+00:00

Hi, @Vishal2 Bansal.

InvokeMethod is a method of ManagementObject. It should not be called in the way of Win32_PnPEntity.InvokeMethod.

These operations generally require administrator privileges.

There is also the following method, which also requires administrator privileges:

Call Win32 API to disable USB and other devices

The SetupDiGetClassDevs function returns a handle to a device information set that contains requested device information elements for a local computer.

The SetupDiEnumDeviceInfo function returns a SP_DEVINFO_DATA structure that specifies a device information element in a device information set.

The CM_Get_DevNode_Status function obtains the status of a device instance from its device node (devnode) in the local machine's device tree.

The CM_Disable_DevNode function disables a device.

The CM_Enable_DevNode function enables a device.

Disable the device by modifying the registry

try { // Open the registry key RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SYSTEM\CurrentControlSet\Services\USBSTOR", true); if (key != null) { // Set the Start value to 4 to disable USB storage //3: Driver/service manually loaded on demand //4: Driver / service disabled key.SetValue("Start", 4, RegistryValueKind.DWord); key.Close(); Console.WriteLine("The USB port is disabled."); } else { Console.WriteLine("The registry key cannot be found."); } } catch (Exception ex) { Console.WriteLine("Error occurred:" + ex.Message); }

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Hongrui Yu-MSFT 4,200 Reputation points Microsoft Vendor

2025-01-22T01:10:42.5833333+00:00

Hi, @Vishal2 Bansal.

Are there any other updates to this question? Did my answer help you solve your problem? If yes, you could accept it as the answer. This will be helpful to community members who have similar questions.
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I want to disable/enable usb and HDMI port whenever my c# wpf (.net Framework 4.7.2) app runs.

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