Windows Gadgets will not run with User Account Control set to Never Notify.
"Maybe you noticed that once you turn off UAC you can’t use the gadgets anymore, as a security measure. But if you want to risk using them, there a simple way to do it, even with UAC turned off. Press the Windows Key, type ‘regedit’, go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Sidebar\Settings and create a DWORD value named AllowElevatedProcess and set its value to 1. Now you should be able to use your gadgets. If not, then reboot your PC and you should be done."
This is not mine, But I do not have the original Link. In any event it worked for me.