Lock everything but slicer buttons

Hi,
I have designed a dashboard for a client in Excel 2010 with Powerpivot.
It is supposed to provide the client with analytical data when using the slicer buttons to filter relevant data.
The thing is I don't want the client's end user to mess up the dashboard if they accidently hit anything else than the slicer buttons.
I have tried to lock the worksheet but that eliminates the possibility to make the sheet refresh the data when the slicer buttons are pressed.
Does anyone know how to work around this? I have tried the different checkmarks under the 'lock worksheet' section.
Thanx in advance.

In the Review ribbon under the Protect Sheet option I have the "Use PivotTable reports" and "Edit objects" items selected. This does not prevent the user from selecting the PivotTable ribbon and making changes as this seems to be needed unlocked in order for the Slicer to operate.