Let's enhance the code a bit. We can get the desktop location automatically by adding a function to get it, rather than hard coding it in the script. This should make it easier by always returning the current users desktop. As long as the user saves the file as "Final Word Processing Instruction Form.doc" to their desktop, this should always work no matter what version of Windows or what user is logged in. Notice a difference in the ".Attachments" line, and the new function at the bottom. Just replace your current code with this, give it a run, and send it to your client.
Private Sub CommandButton1_Click()
Dim outlookapp As Object
Dim item As Object
Dim subject As String
Dim msg As String
Set outlookapp = CreateObject("outlook.application")
msg = "Enter Message here"
subject = "Enter subject here"
Set item = outlookapp.CreateItem(0)
.To = "[email protected]
.subject = subject
.Body = msg
.Attachments.Add GetDesktopFolder & Application.PathSeparator & "Final Word Processing Instruction Form.doc"
Set objShell = CreateObject("WScript.Shell")
GetDesktopFolder = objShell.SpecialFolders("Desktop")
Set objShell = Nothing