A:AnswerThis PC comes with Windows 10 and HP Recovery Manager, HP Support Assistant, HP Games Powered by WildTangent, McAfee LiveSafe (30 days trial), CyberLink Power Media Player, and more.
A:AnswerTechnically since it comes with Win10 you can get it to run Win7 but i really recommend running a PC's standard OS (Operating System) because it's there for the simple reason that it's an improvement.
A:AnswerFrom what I've experienced with OBS & two different editing programs on this particular computer, is that it can handle both pretty well. Though, the live streaming will also depend on you internet connection. If the connection is good, then there shouldn't be a problem running the program on the computer. Happy Streaming. :)