The insults to your machine's integrity from Win 10 are fast, furious and legion. The MS corporation makes hints as to its integrity, but they are sadly, all lies. Running Win 10 is akin to putting yourself under a full body X-Ray at high power--all of the time that your computer is on. There are are far too many security nightmares to list. Please take my word that only a great fool would run Win 10, and the other older Win versions (7,8, 8.1) become Win 10 long before it's "officially" announced to you.
MS is no longer even a smidgen of a "friend" to its users.