Jonathan; Thanks. That was the correct screen. I checked the same boxes as are checked on the computer that is downloading the gadgets with no problems. Didn't help. I thought the problem may be with my browser, am using FireFox. Switched to IE8, and still couldn't download when I selected the 'Install" button.
Went back to FireFox, with the same add-ons as are used on the computer that works, and still wouldn't download. I did however, get a redirect(?) to watson.live.com instead of the download location.
Oh yes, after stopping all the other add-ons I have on the troubled machine, I restarted the computer before trying again.
Also checked the permissions on the good machine, and they are exactly the same as I have on the one that doesn't download gadgets.
Am thinking that maybe I have a problem with either the installation of FireFox or with Windows 7?