Hello guys, I made a program and it worked perfectly for me.
I gave it to one of my old pals, and it worked just as perfect for him.
We both have WindowsXP.

I send 2 new copies of the project to another friends, they have Windows7, it crashes.

I've tried googled it but didn't get any good answers so I'm turning to you guys, again.. If anyone have any experience with this and have a solution, please give me a reply!

This is my code:
Code:
Dim ProcessProperties As New ProcessStartInfo
ProcessProperties.FileName = "ventrilo/mumble/mumble.exe"
ProcessProperties.WindowStyle = ProcessWindowStyle.Maximized
Dim myProcess As Process = Process.Start(ProcessProperties)

This is the error report:
Code:
System.ComponentModel.Win32Exception: Cannot find the file
   vid System.Diagnostics.Process.StartWithShellExecuteEx(ProcessStartInfo startInfo)
   vid System.Diagnostics.Process.Start(ProcessStartInfo startInfo)
   vid WindowsApplication1.Form1.PictureBox4_Click(Object sender, EventArgs e)
   vid System.Windows.Forms.Control.OnClick(EventArgs e)
   vid System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   vid System.Windows.Forms.Control.WndProc(Message& m)
   vid System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   vid System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

mscorlib
    Sammansättningsversion: 2.0.0.0
    Win32-version: 2.0.50727.4927 (NetFXspW7.050727-4900)
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll

----------------------------------------
Ventmix
    Sammansättningsversion: 1.2.0.0
    Win32-version: 1.2.0.0
    CodeBase: file:///C:/Program%20Files%20(x86)/Ventmix.exe
----------------------------------------
Microsoft.VisualBasic
    Sammansättningsversion: 8.0.0.0
    Win32-version: 8.0.50727.4927 (NetFXspW7.050727-4900)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/Microsoft.VisualBasic/8.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
----------------------------------------
System
    Sammansättningsversion: 2.0.0.0
    Win32-version: 2.0.50727.4927 (NetFXspW7.050727-4900)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Windows.Forms
    Sammansättningsversion: 2.0.0.0
    Win32-version: 2.0.50727.4927 (NetFXspW7.050727-4900)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
    Sammansättningsversion: 2.0.0.0
    Win32-version: 2.0.50727.4927 (NetFXspW7.050727-4900)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Runtime.Remoting
    Sammansättningsversion: 2.0.0.0
    Win32-version: 2.0.50727.4927 (NetFXspW7.050727-4900)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Runtime.Remoting/2.0.0.0__b77a5c561934e089/System.Runtime.Remoting.dll
----------------------------------------
System.Windows.Forms.resources
    Sammansättningsversion: 2.0.0.0
    Win32-version: 2.0.50727.4927 (NetFXspW7.050727-4900)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms.resources/2.0.0.0_sv_b77a5c561934e089/System.Windows.Forms.resources.dll
----------------------------------------
mscorlib.resources
    Sammansättningsversion: 2.0.0.0
    Win32-version: 2.0.50727.4927 (NetFXspW7.050727-4900)
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll
----------------------------------------
System.Xml
    Sammansättningsversion: 2.0.0.0
    Win32-version: 2.0.50727.4927 (NetFXspW7.050727-4900)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------