Hello,
If like me for your sins you have AVG Anti-Virus installed, AVG have just done a update to AVG 2014.
My AVG Gadget on my Windows 7 Sidebar has disappeared (have not checked the Vista Computers or the Windows 8 yet) but AVG have posted in their forums saying the Sidebar Gadget has been discontinued.
http://forums.avg.com/ww-en/avg-forums?sec=thread&act=show&id=240145
Stigman