Google isn't happy with the proposed changes to the search functions in Microsoft's Vista operating system and is pressing for the US Justice Department to extend its brief to oversee Microsoft business practices beyond the current November deadline. 

Google has lodged a number of complaints against Microsoft's Instant Search feature, which makes it difficult for users to switch to an alternative offering, such as Google's.
Last week, Microsoft said it will make changes to the operating system that will let users set up non-Microsoft search as their desktop default, with that program than listed in the Windows Start menu.
However, the software giant won't change the way its Instant Search operates, and the changes will only be available towards the end of the year – which Google isn't happy about.