Analysis add-in not showing in data tab

Hi,

I cannot get the Data Analysis button to appear in the Data tab of excel 2010.

I have ensured the Analysis ToolPak is installed and active for excel:

Also that in the trust centre add-ins are not disabled:

I have tried uninstalling the add-in exiting Excel and then re-installing but to no avail.

No other users seem to be able to get this working either. We are Win 7 with Office 2010.  I had a quick look through rsop.msc to see if any restrictions were being applied but didn't see anything obvious.

Any help gratefully received!