Neowin posted a story that a new Windows 10 Insider Preview build has been leaked on the Internet

It's been over a month since the last Windows 10 Mobile build rolled out, but it's a slightly different story for Windows 10 on PCs. The most recent Insider Preview for PCs, build 10532, rolled out just over two weeks ago, and testing continues internally at the company to identify new candidates for release.

Microsoft, of course, tests multiple builds concurrently - and not all of these make it to the public release channels. But one build being tested by the company has escaped its corporate confines, and made it out into the wild.

  Windows 10 Insider Preview build 10537 leaks online