Editing registry on non-admin user (c#, windows 11)

Question

I'm using the following code to disable task manager :

RegistryKey regKey;
string subKey = @"Software\Microsoft\Windows\CurrentVersion\Policies\System";

        
regKey = Registry.CurrentUser.CreateSubKey(subKey);
regKey.SetValue("DisableTaskMgr", 1);
regKey.Close();

My program is running with admin rights. When I run it on non-admin user (I enter the password of an admin user to run it), it doesn't work (the registry key is created successfully, but task manager isn't disabled). When I run it on admin user, it does work.

Does anyone have a solution for this?

Answer 1

I have solved the issue thanks to @RaymondChen comment.

ManagementObjectSearcher searcher = new ManagementObjectSearcher(
            "SELECT UserName FROM Win32_ComputerSystem");

        ManagementObjectCollection collection = searcher.Get();
        string username = (string)collection.Cast<ManagementBaseObject>().First()["UserName"];
        NTAccount account = new NTAccount(username);
        SecurityIdentifier securityIdentifier = (SecurityIdentifier)account.Translate(typeof(SecurityIdentifier));
        string sid = securityIdentifier.ToString();

        string subKey = $@"{sid}\Software\Microsoft\Windows\CurrentVersion\Policies\System";

        RegistryKey regKey = Registry.Users.CreateSubKey(subKey);
        regKey.SetValue("DisableTaskMgr", 1);
        regKey.Close();