An anonymous reader shares a report: A Smaller, more pared down version of Windows 10 was spotted in the latest Redstone 5 preview build. Microsoft is calling it Windows 10 Lean and it's 2GB smaller in size than standard editions of Windows 10 once installed. Missing from this version are the Registry Editor, Internet Explorer, wallpaper, Microsoft Management Console and drivers for CD and DVD drives, and Windows Central notes that the lighter Windows 10 might be designed to ensure tablets and laptops with little internal storage can install Windows 10 feature updates. Additionally, the Redstone 5 preview also features phone-related APIs that support functions like dialing, blocking withheld numbers, video calling, Bluetooth headset support and speakerphone mode, stoking those persistent Andromeda rumors.

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