Had the same, extremely frustrating problem! The only way I have found around it is to press F8 at start up, this enables the page where you need to select 'disable driver signatory'. I then right click on the ANRB icon and select 'run as administrator'. It runs fine then.
It really shouldn't have to be this way when we spend £400 on a piece of kit though! ANRB couldn't help, thanks to Tarbat who did.
Good luck, Dave