Sorry about the ambiguity. The update tries to install and then I get an error stating the installation terminated prematurely due to an error. There is usually no error code, although when I tried to update Dragon Nauturally Speaking I got error code 1607, which implies that I am not logged in as an administrator. I am logged in as an administrator and I even tried opening a new user account but that didn't help. I've tried updating Office 2007, and installing Adobe Acrobat and I get the same errors. Also I get the same error when I try to update vmTools.

I am running a MacBook Pro, OS X 10.5.2, Fusion 1.1.2 and Windows XP SP2.