Windows Cloud: That name has appeared in system files deep within some of the most recent Windows 10 Insider builds. While a few experts guess it could be a new version of Windows, what it actually is remains a mystery. As far as evidence goes, it’s pretty slim pickings. Two names, “Windows Cloud” and “Windows Cloud N,” appear in a list of Windows versions as early as the recent Windows 10 Insider Build 15002, as originally reported by the Walking Cat Twitter account. (The “N” designation likely refers to a version specifically designed for European countries.) ZDNet’s Mary Jo Foley,...