Microsoft is expected to deliver an early preview version of Windows Threshold next month, the codename for what will likely be named Windows 9. The software maker has been gradually working on the release over the past several months, adding and tweaking features ready for a "technology preview" release to the public. Microsoft has been sharing early builds of Threshold to close OEMs and partners, and ZDNet reports that a public preview is expected next month or early October.

The Windows 9 preview will be similar to how Microsoft first let developers test Windows 8, with features not fully complete or missing. ZDNet claims updates will be pushed to users who install the preview on an automatic basis, meaning the release will change rapidly over the coming months before it's finally ready. Existing internal versions of Threshold include a new mini Start Menu, "Metro-style" apps that float in separate windows on the desktop, a virtual desktops feature, the removal of the Charms bar feature, and an early version of Cortana. Microsoft is also making several UI changes to Windows 9, including some tweaks on the desktop to improve upon Windows 8.