Microsoft has reportedly sent the Windows 8.1 software release to manufacturing companies. The final build number for Windows 8.1 will be “9600.16384.130821-1623,” according to Paul Thurrott.
Microsoft was targeting the Windows 8.1 Release To Manufacturing (RTM) date to be around late August for desktop and laptop manufacturers so they are right on time.
Consumers are expected to get their hands on Windows 8.1 on October 18. Reports have indicated that developers most likely will not receive early access to the software though. If those reports are incorrect and Microsoft decides to set up an early access program, it will likely be made available starting September 7th.