When Microsoft released Windows 10 aka Threshold, there was ongoing rumors about Windows Redstone which is expected to arrive next year in two waves same like TH1 and TH2.

Now BuildFeed, reports a new build from Redstone 1 (RS1) has been spotted.

RS1 branches are alive – rs1_onecore_mqbase1 has been detected!

It seems, Microsoft has already started the development of Windows Redstone. However, Software Giant is expected to introduce many new features in Windows Redstone.