The Microsoft antitrust trial has been delayed by a week, after the company requested a postponement to study a revised remedy plan.
Judge Colleen Kollar-Kotelly said at the court hearing that the request by Microsoft for a two-week delay was "way too long", and decided the trial should start on 18 March instead of 11 March.
The nine states, which submitted a revised plan earlier this week urging the judge not to delay the next phase of the case, are seeking harsher sanctions.
They want Microsoft to offer a version of its Windows operating system that would give computer manufacturers and users the ability to swap out extra Microsoft features in favour of those made by competitors.
The states that rejected the settlement, including California and Massachusetts, also asked that Microsoft reveal the software blueprints for its Internet Explorer web browser.
Kollar-Kotelly disputed the nine states' claim that the changes were minor clarifications, and said: "There are some substantive changes."
On Wednesday, Kollar-Kotelly heard the Justice Department's and Microsoft's reasons why she should approve the deal. She indicated she would not make her determination soon.
A number of witnesses, including top Microsoft executives and officials from rival companies, are expected to testify at the proceedings.
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