This day one patch fixes numerous issues, provides optimizations and even adds some minor features. KB3074683 is the launch patch for the 64-bit version of the Windows 10 OS, and it was available for download and installation on the first day Windows 10 was available to the public. The Windows 10 64-bit Launch Patch or KB3074683 is the first patch released for the Windows 10 operating system and an essential download.
