Both the PC and speakers are hardly used. I use my laptop, this was just built for gaming, then I ended up getting into console gaming instead.
Comes with Windows 10 Pro, but I can install 11 if you want.
I also have a Nixeus 34 Inch Ultra wide curved 3440x1440 144hz monitor but the stand screws came off at the back of the monitor. It works fine otherwise. That I'll throw in for free with purchase.