They were expected to meet next week with US District Judge Colleen Kollar-Kotelly and Microsoft lawyers to more broadly describe the company's efforts to abide by terms of the settlement.
A Microsoft spokeswoman, Stacy Drake McCredy, said the company agreed to the redesign for business reasons.
A statement from the Justice Department said the government was pleased with the decision "regardless of the reason for the change".
The latest dispute centers on a design feature in Windows called "Shop for Music Online", which lets consumers purchase compact discs from retailers over the internet. When consumers click the link to buy music, Windows opens Microsoft's browser even after consumers specify that they prefer using rival browser software.
The link — prominent whenever a computer user opens a designated folder containing songs — steers Windows users to a website, windowsmedia.com, operated by Microsoft with links to online retailers, such as Buy.com or CDNow.
The Windows behavior does not affect consumers who use a rival internet browser to directly visit other music sellers, such as Apple Computer's new iTunes site or the Rhapsody service from Listen.com.
The dispute affected one of the central tenets of the antitrust settlement: improving the ability of rival software vendors to compete against Microsoft's own programs running on Windows. One settlement provision allows Microsoft's own programs to override competitors only if rival software "fails to implement a reasonable technical requirement".