How do I open another application GUI by windows service

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Windows

WinForms

Windows-service

I'm trying to open an application(with it's GUI) thorough the windows service. It's not throwing any exception or error. Its not opening the application. When I executed the same code with windows Forms app the applicaiton is opening. Why the windows service is not opening any other application ?

In my code I tried to check if "AnyDesk" application is installed or not. If installed I'm trying to open it. But its not opening the app.

When I checked in "task manager" it's showing in "background process" apps list. But the User Interface is not opening. How can I make it to open ?

My code is like below :

What I have tried:

protected override void OnStart(string[] args)
    {
        try
        {
            bool isinstalled = checkInstalled("AnyDesk");
            if (isinstalled)
            {
                Process.Start(@"C:\Program Files (x86)\AnyDesk\AnyDesk.exe");
            }
        }
        catch (Exception ex)
        {
            this.EventLog.WriteEntry(ex.Message, EventLogEntryType.Information);
        }
    }



    public static bool checkInstalled(string c_name)
    {
        string displayName;

        string registryKey = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";
        RegistryKey key = Registry.LocalMachine.OpenSubKey(registryKey);
        if (key != null)
        {
            foreach (RegistryKey subkey in key.GetSubKeyNames().Select(keyName => key.OpenSubKey(keyName)))
            {
                displayName = subkey.GetValue("DisplayName") as string;
                if (displayName != null && displayName.Contains(c_name))
                {
                    return true;
                }
            }
            key.Close();
        }

        registryKey = @"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall";
        key = Registry.LocalMachine.OpenSubKey(registryKey);
        if (key != null)
        {
            foreach (RegistryKey subkey in key.GetSubKeyNames().Select(keyName => key.OpenSubKey(keyName)))
            {
                displayName = subkey.GetValue("DisplayName") as string;
                if (displayName != null && displayName.Contains(c_name))
                {
                    return true;
                }
            }
            key.Close();
        }
        return false;
    }