A few months ago, Bill Gates revealed that his “greatest mistake ever” was Android winning mobile. Today, the Microsoft founder has expanded on his regret and pointed to the company’s antitrust issues as the reason behind their downfall in the early 2000s for Windows Mobile.

Gates spoke at the DealBook Conference today that was hosted by The New York Times. During the event, the executive was asked how the Justice Department’s antitrust case impact on Windows Mobile. Gates talked about how the investigation was harmful and how they were so close.

“There’s no doubt that the antitrust lawsuit was bad for Microsoft. We would have been more focused on creating the phone operating system and so instead of using Android today you would be using Windows Mobile if it hadn’t been for the antitrust case.”

The executive also shared how they were “too distracted” in defeating Microsoft that they were unable to beat Android. He also mentioned a time when they were “three months too late with the release that Motorola would have used on a phone.” The executive did not go into detail on what device he was talking about or the exact time this happened. 

Gates ended his talk by pointing out how the mobile industry was a “winner-take-all-game.” This coincides with Gates’ earlier statement this year on how he believes Microsoft lost on $400 billion because of Android and how it became the default OS platform. 

Despite Gates’ regrets, Microsoft still intends to use Android OS to support its first foldable device they are releasing next year, the Surface Duo. 

You can watch the conference here.