Untested Windows 10 Build accidentally released to insiders on all ring

Microsoft Windows Insider team today made a fault by releasing Untested Windows 10 Insider preview Build 18947 that hasn’t been tested internally yet. According to Reddit, This build was released on both 32-bit and 64-bit Machine. The Windows Insider team are looking into it.

Source: Reddit via Windows Central

Update: Microsoft recently explained how to rollback from build 18947.