At PC Gamer's PC Gaming Show at E3, Microsoft’s Xbox boss Phil Spencer admitted that his company has dropped the ball lately when it comes to catering to the PC game market.

“There have been times in our past where maybe Microsoft has lost its way with PC gaming,” Spencer said, adding that games are critical to Microsoft and Windows’ success.

Though Microsoft owns the most ubiquitous PC OS in Microsoft Windows, the company's game program has been more focused on the living room experience with Xbox.

Windows 10 is due in July, and with it, Microsoft intends on making cross-platform development easier for game developers. Windows 7 and 8 users will get 10 as a free upgrade, and Spencer said that was so developers would have a common platform to target.

 “As developers look at a common ecosystem, with everyone on one version of Windows, it just makes it easier for everyone developing games,” Spencer said. “[We’re] just trying to make it easier for developers to make Windows games.”

Spencer also said that Microsoft is also dedicated to first party PC game development. Though he didn’t offer too many more specifics, he did confirm Killer Instinct is coming to PC, and was on-stage as Microsoft-owned Lionhead showed off the latest in the Fable franchise.