Summary:
- Microsoft officially released the initial(RTM) build and version of Windows 10 on July 29, 2015.
Comments:
- Build Number – 1507 Version Number – 10240
- Windows 10 is a free upgrade for genuine Windows 7 SP1 and Windows 8.1 Update operating systems
- The free upgrade period starts on July 29, 2015 and ends on July 29, 2016
- Windows 10 free upgrade is available via Windows Update on Windows 7 SP1 and Windows 8.1 Update devices.
- Windows 10 installation media(DVD/USB) to upgrade and/or perform a clean installation will be available(for free) from Microsoft at a later date.
Additional Information:
Windows 10 Free Upgrade Available in 190 Countries Today
Windows 10 Specifications & Systems Requirements
Windows 10 Upgrade Frequently Asked Questions
Revisions:
July 29, 2015: Original Draft
July 30, 2015: Original Publish Date
August 2, 2015: Added link for System Requirements and Specifications
August 15, 2015: Added link for FAQ(Frequently Asked Questions)
Windows Unplugged 