There is no line in the document that contains 'this computer' and comment symbol. Can I assume you mean the line that contains 'Change Notification: Initial Screen' ? In which case
Code:
Sub DeleteRow()
Dim oRng As Range
Set oRng = ActiveDocument.Range
With oRng.Find
Do While .Execute("Change Notification: Initial Screen")
oRng.Rows(1).Delete
Exit Do
Loop
End With
End Sub