Prekopirano sa jednog stranog foruma...
What you can try is to go here:
C:\Users\<your user name>\AppData\Local\Microsoft\Windows Sidebar\Gadgets
In that folder should be the problematic gadget which you can delete.
The AppData folder is hidden so to see it, if you have not already, do this:
Start > Control Panel > Appearance and Personalization > Show hidden files and folder (under Folder Options) > select "Show hidden files and folders and drives"> OK
Probaj na ovaj način (ako razumeš dobro engleski ne bi trebalo da bude problema)