Yet another build of Windows 10, this time 10240 is available, and it’s a TH build meaning threshold or ‘very near to RTM’
After the update is complete you get a new OOBE requiring you to accept the updated license terms, review the new apps like Microsoft EDGE and then accept the settings changes, once you login, the Windows Watermark version number is gone (if you upgraded from a previous Windows 10 build), and you can review the Windows version using winver via a cmd prompt.
This build feels complete, and several sites including The Verge claims it might be the RTM release. You can read about the official release here: http://blogs.windows…and-slow-rings/