Try with this code
Dim oServ As Object
Dim cProc As Variant
Dim oProc As Object
Set oServ = GetObject("winmgmts:")
Set cProc = oServ.ExecQuery("Select * from Win32_Process")
For Each oProc In cProc
'Rename EXCEL.EXE in the line below with the process that you need to Terminate.
'NOTE: It is 'case sensitive
If oProc.Name = "EXCEL.EXE" Then
MsgBox "KILL" ' used to display a message for testing pur
oProc.Terminate()
End If
Next