Microsoft has warned users of Windows Vista and Windows 7 to disable the gadgets accessory due to security issues. http://technet.microsoft.com/en-us/security/advisory/2719662
The Gadgets feature is a Java based feature that allows code to execute and is enabled by default on all standard systems.
Microsoft supplied an automatic fix tool with the advisory: http://technet.microsoft.com/en-us/security/advisory/2719662