This is not actually a bug. It is just administrator-level rights mash up. What happens is when you deactivate UAC, the gadgets on your desktop stop working. Without wasting time, here’s a quick solution:
Open Registry Editor (regedit in the Run dialog box). Navigate to “HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionSidebarSetting”
Create new DWORD value in the right pane and name it ‘AllowElevatedProcess’ and set its value to 1.
Done! Your gadgets should work fine with UAC disabled.