Ghost 15 Install - Sufficient Privileges

When I try to setup Ghost 15 I get the following error message:

 

   You do not have sufficient privileges to perform this operation.

 

This is on Windows 7 Ultimate 32 bit.

 

I have been through the un-install / re-install with the same result.

 

I am installing from an administrator type user account.  I have also tried Run As Administrator but got the same result.

 

Any clues appreciated!

 

Peter