https://www.techpowerup.com/224669/m...versary-update

Microsoft late Tuesday rolled out the Windows 10 Anniversary Update, marking 1 year in the market for the operating system, and with it, ending the Windows 10 Free Upgrade offer. The new update bears the internal version 1607, with build 14393. The update is several gigabytes in size, and effectively replaces your existing Windows 10 installation.

The update adds new features to Windows Ink, the stylus-based live notes app; Cortana, the voice assistant, which can now be accessed right from the lock-screen, and is integrated with even more apps; and Windows Hello, the in-built biometric ID system, which has been integrated with many more third-party services, such as Dropbox; improvements to Windows Defender, the anti-malware tool; and various under-the-hood improvements that increase performance and energy-efficiency (lower battery usage).