If you have a rare glitch where you drag out a gadget to your desktop, and all that appears is a graphic that stays stuck on your screen, among other issues, try the following solution that worked for me:

• Open taskmgr and kill sidebar.exe process.
• Press the start button, paste the following in and press enter: %localappdata%\microsoft\Windows Sidebar
• Rename the Settings.ini to Settingsold.ini and then launch the gadgets again.