Microsoft is changing the way Internet Explorer prompts users during the installation process, in a move that could be a response to increasing pressure from the European Union over anti-trust claims.

The software giant said in a blog posting that it is trying to make the user's choice of default browser more explicit.

"The goal of the IE setup experience is to put IE users in control of their settings and respect existing defaults. IE will never install, or become the default browser without your explicit consent," wrote the IE team.

"However, we heard a lot of feedback from a lot of different people and groups and decided to make the user choice of the default browser even more explicit. This change is part of our ongoing commitment to user choice and control."

As part of the changes, users who install IE 8 and have another browser already set as default will be presented with a new pop-up asking whether they want to change their default browser to IE.

In order to roll out this feature as quickly as possible to as many users as possible, Microsoft says it will be doing so as part of a dynamic update rather than a full re-release. The update is set for mid-August.

"We will make this change available in the next cumulative security update for IE, so administrators that regularly deploy security updates throughout their organisation can easily incorporate this new behaviour," said the IE team.

"Administrators can find information about how to manage software and security updates in the Update Management TechCenter on Technet. Administrators can customise the default browser settings using 'Set Program Access Defaults'."

Microsoft has long been in trouble with the EU over the 'unfair' bundling of IE. In June, the European Commission criticised Microsoft's plans to offer a version of Windows 7 without IE.

"The Commission had suggested to Microsoft that consumers be provided with a choice of web browsers," said the Commission in a statement at the time.

"Instead, Microsoft has apparently decided to supply retail consumers with a version of Windows without a web browser at all. Rather than more choice, Microsoft seems to have chosen to provide less."