Windows 7 Sidebar & Gadgets is very useful for us. But sometimes windows 7 gadgets not working. This maybe cause by disable UAC.
How to fix windows 7 gadgets (Including Windows 7 X64 bit):
Click the Start button --> type regedit in the search box and press Enter --> in the registry editor, navigate to following registry key:
Then in right pan of the editor, right-click to create A New 32 Bit Value DWORD and named “AllowElevatedProcess” with set value as “1”.
The gadgets will work properly. Now I rightclick anywhere on desktop and select gadgets. Add something and put them on desktop.