A Windows 7 Federated Search Connector for Bing allows users to easily search Bing from within Windows 7:
To use it simply;
- create a new folder on your C: drive “Search Connectors”
- download the Bing.osdx file to this new folder
- double click the Bing.osdx file
- click Install, then you are ready to go
Source: MSDN Blogs