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Windows Insider Programme for Developers

Build even greater apps with the latest tools and resources.

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Explore Windows 10 SDK Insider Preview Builds

We regularly release pre-release versions of the Windows 10 software delivery kit (SDK) and mobile emulator to try out the latest Windows 10 Insider Previews1. You can also download detailed release notes for each, including details on new APIs, controls, issues, fixes and more.

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Share your feedback

Just like for our Windows Insider Preview, we'd like your feedback on our Windows Insider Preview SDKs and mobile emulators. Go to the Developer Forum to provide feedback and get updates. Go to Windows Platform Uservoice to submit new feature requests.

1 Windows Insider Preview may be substantially modified before it's commercially released. Microsoft makes no warranties, express or implied, with respect to the information provided here. Some product features and functionality may require additional hardware or software.