Microsoft has warned that a Gadgets feature included in Vista and later versions of Windows could allow attackers to hijack end-user machines and has taken the unusual step of issuing a temporary update that allows it to be completely disabled.
http://arstechnica.com/security/2012/07 ... content%29
Microsoft added the Gadgets feature and an accompanying Sidebar to Windows Vista in hopes of matching the success Apple had with a similar feature called Dashboard, which is included in Mac OS X. It allows end users to add clocks, stock tickers, and other small apps to their desktops. A few weeks ago, Microsoft pulled the plug on its official Gadgets gallery. The page now includes a warning that says, "Gadgets installed from untrusted sources can harm your computer and can access your computer's files, show you objectionable content, or change their behavior at any time."
An accompanying Fix-it, which users are free to use or ignore, is described as a "workaround" and completely disables the Windows Sidebar and Gadgets.