Put this Event macro in the worksheet code area:

Private Sub Worksheet_Calculate()
Application.EnableEvents = False
Application.ScreenUpdating = False
Dim r As Range, w As WorksheetFunction
Dim nFirstRow As Long, nLastRow As Long, NN As Long
ActiveSheet.UsedRange
Set r = ActiveSheet.UsedRange
Set w = Application.WorksheetFunction
nLastRow = r.Rows.Count + r.Row - 1
nFirstRow = r.Row
For NN = nFirstRow To nLastRow
    If w.CountBlank(Rows(NN)) = Columns.Count Then
        Range("A" & NN).EntireRow.Hidden = True
    Else
        Range("A" & NN).EntireRow.Hidden = False
    End If
Next
Application.ScreenUpdating = True
Application.EnableEvents = True
End Sub

Because it is worksheet code, it is very easy to install and automatic to use:
1. right-click the tab name near the bottom of the Excel window
2. select View Code - this brings up a VBE window
3. paste the stuff in and close the VBE window
If you have any concerns, first try it on a trial worksheet.

If you save the workbook, the macro will be saved with it.


To remove the macro:
1. bring up the VBE windows as above
2. clear the code out
3. close the VBE window
To learn more about macros in general, see:

http://www.mvps.org/dmcritchie/excel/getstarted.htm

To learn more about Event Macros (worksheet code), see:

http://www.mvps.org/dmcritchie/excel/event.htm

Macros must be enabled for this to work!